Quick Answer: We will cover spot cleaning, full surface washing, how to handle toppers with removable covers, drying methods that preserve the foam structure, and the signs that tell you a topper is past saving.
Your foam mattress topper absorbs body oils, sweat, and dead skin every single night. Over time, that buildup affects both hygiene and performance , the foam softens unevenly, odours set in, and allergens accumulate in the dense material. Knowing how to wash a foam mattress topper correctly is the difference between extending its life by years and accidentally destroying it in one laundry cycle.
This guide focuses specifically on foam toppers , those 2-to-4-inch layers of memory foam, gel foam, or open-cell foam that sit on top of your mattress. They are fundamentally different from thinner mattress pads: denser, slower to dry, and far more sensitive to heat and agitation. Methods that work fine on a quilted pad will tear apart a foam topper.
We will cover spot cleaning, full surface washing, how to handle toppers with removable covers, drying methods that preserve the foam structure, and the signs that tell you a topper is past saving.
Understanding What You Are Actually Washing
Before you touch any water, it helps to understand what foam actually is and why it reacts poorly to standard laundry methods.
Memory foam and open-cell foam are composed of millions of tiny interconnected air pockets. That cellular structure is what gives the foam its pressure-relieving properties. When you saturate it with water and then put it through a washing machine's spin cycle, you are mechanically compressing and twisting those cells in ways they were not designed to handle. The result is tearing, clumping, or permanent deformation , none of which you can fix after the fact.
Heat compounds the problem. Memory foam begins to break down at relatively low temperatures. A standard dryer on medium or high heat can literally melt the polymer chains holding the foam together, leaving you with a misshapen, crumbly layer that provides no support and does not spring back.
That is why the approach to cleaning a foam topper is almost the opposite of how you would wash a fibrefill or cotton pad. Gentle is not just a preference , it is a structural requirement.
Types of Foam Toppers and How They Differ
| Foam Type | Density | Drying Time | Special Considerations |
|---|---|---|---|
| Traditional memory foam | 4–6 lb/ft³ | 24–48 hours | Most heat-sensitive; avoid any agitation |
| Gel-infused memory foam | 3–5 lb/ft³ | 24–36 hours | Gel beads can migrate if foam tears |
| Open-cell foam | 2–3 lb/ft³ | 12–24 hours | More breathable; absorbs water faster |
| Latex foam | 4–6 lb/ft³ | 24–48 hours | Sensitive to oils and petroleum-based cleaners |
Step 1 , Vacuum Before You Do Anything Else
Remove the topper from the bed and lay it flat on a clean surface , a large table, clean floor, or outdoor area on a dry day. Use the upholstery attachment on your vacuum to thoroughly go over both sides.
Vacuuming first removes dry debris: dead skin cells, pet dander, dust mite waste, hair, and fine particles that would otherwise turn into muddy streaks when wet. It also gives you a clearer look at the topper's actual condition , staining, discolouration, or structural damage that may affect how you proceed.
Take your time on both sides. Memory foam holds particulate matter deep in its surface cells, and a slow, overlapping pass gets far more out than a quick once-over.
Step 2 , Spot Cleaning for Localised Stains
For most stains on a foam topper, spot cleaning is both sufficient and preferred. It allows you to treat the problem without saturating the entire topper, which dramatically reduces drying time and risk of damage.
What You Need
- Cold water
- Mild dish soap or enzyme-based upholstery cleaner
- White cloths or microfibre towels
- A spray bottle
- Baking soda (optional, for odour)
The Spot Cleaning Process
Mix a cleaning solution. Combine one teaspoon of mild dish soap with two cups of cold water in a spray bottle. For protein-based stains like blood, urine, or sweat, an enzyme-based cleaner is more effective , enzymes break down the biological material rather than just diluting it.
Test on an inconspicuous area first. Apply a small amount to the underside or edge of the topper and wait two minutes. If the foam discolours or the surface texture changes, switch to plain cold water or try a different product.
Blot, do not rub. Spray the solution lightly onto the stain and blot from the outer edge inward with a clean white cloth. Rubbing spreads the stain and pushes it deeper into the foam cells. Blotting lifts it.
Rinse carefully. Dampen a second cloth with plain cold water and blot over the treated area to remove soap residue. Soap left in foam attracts new dirt quickly.
Apply baking soda. Once the spot is treated, sprinkle a thin layer of baking soda over the area and let it sit for 8–12 hours. Baking soda neutralises odours and draws out residual moisture. Vacuum it off when done.
Stain-Specific Tips
| Stain Type | Best Approach | Avoid |
|---|---|---|
| Sweat / body oil | Enzyme cleaner + cold water rinse | Hot water (sets oils) |
| Urine | Enzyme cleaner, blot repeatedly | Vinegar on memory foam (can degrade foam) |
| Blood | Cold water + hydrogen peroxide (test first) | Warm or hot water |
| Food / drink | Dish soap solution, blot and rinse | Scrubbing or abrasive cloths |
| Mould / mildew | Diluted rubbing alcohol, air dry fully | Bleach (destroys foam structure) |
Step 3 , Full Surface Wash (When Needed)
A full surface wash is appropriate when the topper has widespread discolouration, persistent body odour across the entire surface, or visible soiling that spot cleaning cannot address. This is more intensive than spot cleaning but still does not involve a washing machine.
Bathtub Method
The bathtub is the safest and most practical environment for washing a full foam topper.
- Fill the tub with enough lukewarm water to submerge the topper , never hot water.
- Add a small amount of mild, bleach-free liquid detergent (about two tablespoons for a queen-size topper). Swirl to mix before adding the topper.
- Submerge the topper and gently squeeze it , as if kneading bread , to work the soapy water through the foam cells. Do not twist, wring, or fold it sharply.
- Drain the soapy water. Refill with clean cool water and repeat the gentle squeezing process to rinse. You may need to refill and rinse two or three times until the water runs clear and free of suds.
- Once rinsed, gently press , do not wring , to remove as much water as possible. Place it flat on clean towels and press additional towels on top to absorb surface moisture.
The topper will be very heavy when saturated with water. Have a plan for moving it to a drying area before you start.
Can You Put a Foam Topper in the Washing Machine?
For solid foam toppers, no. The agitation cycle , even on gentle , subjects the foam to mechanical stress it cannot withstand. Most foam toppers will develop tears or lose structural integrity after machine washing.
However, many modern toppers have a removable cover (typically a quilted fabric or bamboo-blend shell that zips off). That cover can almost always be machine washed according to its own care label , usually cold water, gentle cycle, tumble dry low. The foam insert inside should still be cleaned by hand using the methods above.
If your topper has a non-removable fabric cover, treat that cover as part of the foam , clean it by spot treatment or the bathtub method rather than machine washing.
Step 4 , Drying Your Foam Topper Correctly
Drying is where most people make their biggest mistake. Foam toppers need complete drying before they go back on the bed. Any residual moisture trapped inside creates the conditions for mould and mildew growth , and in a dense foam layer, you may not detect mould until it has spread significantly.
Air Drying: The Only Correct Method
Place the topper flat on a clean, elevated surface that allows air circulation underneath , a drying rack, two sawhorses, a clean outdoor table, or across the top of your shower stall. Laying it directly on the floor restricts airflow to the bottom half and dramatically increases drying time.
Rotate the topper every few hours so both sides dry evenly. A queen-size memory foam topper that is 3 inches thick should be considered fully dry when it feels completely dry to the touch in the thickest areas , not just the surface. Press your palm firmly into the centre to check for any remaining coolness or moisture.
Speeding Up the Process Safely
- Fan circulation: Position one or two fans to blow across the surface of the topper. This significantly accelerates evaporation without introducing heat.
- Dehumidifier: Running a dehumidifier in the same room pulls moisture from the air, making evaporation more efficient.
- Outdoor drying: On a warm, sunny day with low humidity, drying outdoors cuts drying time considerably. Keep the topper out of direct, intense sunlight for extended periods , UV exposure degrades foam over time. An hour or two in morning sun is fine; eight hours in direct summer sun is not.
- Baking soda on damp foam: Once the topper is mostly dry but still slightly damp, a layer of baking soda applied to both sides for two hours will draw out the last traces of moisture and eliminate any remaining odour.
What to Avoid When Drying
- The tumble dryer: Even on air-only or no-heat settings, the mechanical tumbling damages foam. The confined heat environment of a dryer also retains moisture rather than releasing it properly.
- Hair dryers or heat guns: Concentrated heat degrades foam polymers within minutes.
- Putting it back on the bed while damp: A damp topper against a mattress creates a closed, humid environment that breeds mould on both surfaces.
Typical Drying Times by Topper Thickness
| Thickness | Fan-Assisted Indoors | Outdoor (Warm Day) |
|---|---|---|
| 1–2 inches | 8–12 hours | 4–6 hours |
| 2–3 inches | 18–24 hours | 8–12 hours |
| 3–4 inches | 24–48 hours | 12–24 hours |
How Often Should You Clean a Foam Topper?
Spot clean as stains occur. For full surface cleaning, most foam toppers benefit from a thorough cleaning every six months, with a baking soda deodorising treatment (vacuum on, let sit, vacuum off) once a month in between.
If you use a quality mattress protector over the topper, you can extend full cleaning intervals to once a year. The protector catches the majority of moisture and oils before they reach the foam, which is both better for the topper and dramatically easier for you on laundry day.
Recommended Maintenance Schedule
| Task | Frequency |
|---|---|
| Vacuum both sides | Monthly |
| Baking soda deodourising treatment | Monthly |
| Spot clean stains | As needed (immediately) |
| Full surface wash (bathtub method) | Every 6 months (every 12 months if using a protector) |
| Air out without bedding | Every 4–6 weeks |
Deodourising Without a Full Wash
Between full cleaning cycles, baking soda remains the most effective and safest deodouriser for foam toppers. The process takes no water and carries no risk of moisture damage.
- Remove all bedding and the mattress protector.
- Lay the topper flat and sprinkle a generous, even layer of baking soda across the entire top surface.
- Leave it for a minimum of 8 hours , overnight is better. The baking soda needs time to absorb oils and neutralise acidic odour compounds.
- Vacuum thoroughly to remove all the baking soda.
- Flip the topper and repeat on the underside.
For a particularly persistent body odour problem, you can lightly spray the surface with a 50/50 mixture of water and white vinegar before applying the baking soda. Allow the vinegar to dry for 30 minutes first. Note: this method should be used sparingly on memory foam, as repeated vinegar exposure can gradually affect the foam surface over time.
Toppers with Removable Covers: A Different Process
Many newer foam toppers come with a zippered cover that is designed to be removed and washed separately. This is a significant practical advantage and changes the cleaning routine considerably.
Washing the Cover
Check the care label , most fabric covers for foam toppers can be machine washed in cold water on a gentle cycle. Bamboo, Tencel, and cotton-blend covers are generally safe for low-temperature machine washing. Avoid fabric softener, which can coat fibres and reduce breathability.
Tumble dry on low heat or air dry flat. High heat can cause shrinkage, making the cover difficult to zip back onto the topper.
Cleaning the Foam Insert
With the cover removed, the foam insert is exposed and easier to access directly. Use the spot-cleaning method for any stains that have reached the foam itself, then allow it to air out fully before replacing the cover. Putting the cover back on damp foam creates the same mould risk as putting damp foam on a mattress.
If the foam insert has widespread soiling or odour, use the bathtub method described above, ensuring complete drying before re-covering.
Signs Your Foam Topper Needs Replacing, Not Cleaning
Cleaning is maintenance , it extends the life of a foam topper in good condition. But there comes a point when cleaning is no longer the right answer.
Replace Your Topper If You Notice:
Permanent body impressions. A foam topper should return to its original shape when you get out of bed. If you can see and feel a permanent dip where you sleep, the foam cells have broken down and no amount of cleaning restores them.
Inconsistent support across the surface. Areas that feel firmer or softer than the rest indicate uneven foam degradation. This creates pressure points that disrupt sleep quality.
Visible mould or mildew growth. Surface mould on a fabric cover can sometimes be treated. Mould that has penetrated into the foam itself cannot be safely or fully removed. The topper should be disposed of promptly.
Persistent odour after cleaning. Body oils and biological compounds can penetrate deeply into high-density foam over years of use. If the topper smells despite thorough cleaning and deodourising, the source is embedded too deeply to remove.
Foam crumbling or tearing. Physical breakdown of the foam material , visible as small chunks, tears along the surface, or crumbling at the edges , indicates the end of the topper's useful life.
You are waking up with back or joint pain. Sometimes the topper simply no longer provides adequate support, regardless of its visible condition. Sleep quality is the most important test of any sleep surface.
Average Lifespan of Foam Toppers
| Topper Type | Typical Lifespan | With Protector |
|---|---|---|
| Budget foam (1–2 lb density) | 1–2 years | 2–3 years |
| Standard memory foam (3–4 lb) | 3–4 years | 4–5 years |
| High-density memory foam (5+ lb) | 5–7 years | 6–8 years |
| Latex foam | 8–12 years | 10–15 years |
Protecting Your Topper Between Cleanings
The most effective thing you can do for a foam topper is protect it from moisture before it ever becomes a problem. A quality waterproof mattress protector placed over the topper creates a barrier that stops sweat, spills, and skin oils from reaching the foam.
This is especially important for foam toppers because, unlike a mattress with its own fabric cover, many foam toppers have minimal surface protection. Every bit of moisture that does not reach the foam is moisture you do not need to clean later.
Related reading: how to clean a mattress topper covers general topper care across different materials. For mattress-level care, see our guides on how to clean a mattress and choosing the right mattress protector. If you are also managing stains on the mattress itself, our article on how to get urine out of a mattress covers the full process.
Frequently Asked Questions
Can I put my foam mattress topper in the washing machine?
No. Machine washing a solid foam topper , even on a gentle cycle , causes tearing and permanent deformation. The agitation physically damages the foam's cellular structure. If your topper has a removable zippered cover, that cover can be machine washed according to its care label. The foam insert should always be cleaned by hand.
How do I get the smell out of a foam topper?
Baking soda is the most effective deodouriser for foam. Sprinkle it generously over the entire surface, leave it for 8–12 hours, then vacuum it off. Repeat on the underside. For stubborn odours, a light spray of diluted white vinegar (let it dry before applying baking soda) adds extra odour-neutralising power. Ensure complete drying after any wet treatment.
How long does a foam topper take to dry after washing?
A 2-to-3-inch memory foam topper takes 18–48 hours to dry completely indoors with fan assistance. Outdoors on a warm, low-humidity day, drying time can be reduced to 8–12 hours. Never place a foam topper back on the bed until it is completely dry throughout , not just on the surface.
Can I use a hair dryer to speed up drying?
No. Concentrated heat from a hair dryer will degrade and potentially melt the foam polymers. Even a hand held dryer on the cool setting creates enough air restriction to cause uneven drying without actually accelerating the overall process. Use a fan instead , it is safer and more effective.
How do I clean urine from a foam topper?
Act immediately. Blot up as much liquid as possible with towels. Apply an enzyme-based cleaner directly to the stain and let it work for 10–15 minutes before blotting. Rinse with a cold, damp cloth. Apply baking soda and leave for 12 hours, then vacuum. For set-in urine odour that has penetrated deeply into the foam, a full bathtub wash may be needed.
How often should I clean my foam topper?
Spot clean immediately whenever spills or stains occur. Do a baking soda deodourising treatment monthly. Perform a full surface wash every 6 months, or every 12 months if you use a waterproof mattress protector over the topper.
Is it safe to use vinegar on a memory foam topper?
Diluted white vinegar can be used occasionally as a deodouriser or for treating some stains, but it should not become a regular cleaning solution for memory foam. Repeated acid exposure can gradually degrade the foam surface over time. Enzyme cleaners are a safer choice for biological stains, and baking soda is preferable for routine odour control.
What is the difference between cleaning a foam topper vs. a foam pad?
Foam toppers are thicker and denser than mattress pads , typically 2 to 4 inches of solid foam versus a thin layer of lightweight fill. Toppers hold water longer, require more careful drying, and are more sensitive to agitation. Thinner foam pads sometimes tolerate gentle machine washing; solid foam toppers do not. Always treat a foam topper with the hand-washing methods described here.
Sources
- Ozkaya, O., & Merdol, T.K. (2018). "Viscoelastic Polyurethane Foams: Structure-Property Relationships and Durability." Journal of Cellular Plastics, 54(3), 233–257.
- American Cleaning Institute. (2022). Fabric Care Reference Guide. Washington, DC: ACI. Retrieved from cleaninginstitute.org
- Environmental Protection Agency. (2023). Mold Remediation in Schools and Commercial Buildings. EPA 402-K-01-001. United States Environmental Protection Agency.
- Sleep Foundation. (2024). "How to Clean a Mattress Topper." sleepfoundation.org/bedding-information/how-to-clean-a-mattress-topper
- Canadian Centre for Occupational Health and Safety. (2023). Indoor Air Quality: Mould in the Workplace. Hamilton, ON: CCOHS.
- International Sleep Products Association. (2022). Mattress and Bedding Care Guidelines. Alexandria, VA: ISPA.
Can you get foam mattress toppers at Canadian Tire?
Canadian Tire does carry foam mattress toppers, typically basic polyfoam options (1 to 2 inch thickness, medium density) in the $40 to $120 range. These are functional for light comfort improvement but not suitable as a primary sleep surface upgrade. If you need a foam mattress topper for a dedicated sleep improvement - back pain relief, pressure point reduction, temperature regulation - a specialty sleep store will have better options: memory foam, latex, or copper-infused foam toppers with 2 to 4-inch profiles and manufacturer sleep trials. Canadian Tire toppers typically have no comfort trial period and limited returns once opened.
What is a thick mattress topper?
A thick mattress topper is generally 3 to 4 inches deep, versus the 1 to 2-inch standard options. Thick toppers significantly change the feel of the mattress below - softening a firm mattress, adding pressure relief, or in the case of a cooling gel topper, improving surface temperature. The trade-off: a 4-inch topper changes the height of your sleeping surface and may make deep-pocket sheets necessary if your current sheets are standard depth. Thick toppers also retain heat more than thin toppers unless the fill material has active airflow (convoluted foam, open-cell gel foam, or natural latex).
Where can I find a mattress topper if Canadian Tire is out of stock?
For mattress toppers beyond what Canadian Tire carries, Mattress Miracle in Brantford stocks foam and natural fill toppers with in-person testing. Call 519-770-0001 to confirm current topper inventory before visiting. We also carry So Sleepy toppers starting at $139 - a Canadian brand with copper-infused and latex options not typically available at hardware or general retail stores.
Washing a foam mattress topper in a washing machine is not recommended because the agitation and spin cycle can tear the foam, especially memory foam and latex, and the water absorption causes the topper to become extremely heavy (a queen memory foam topper can absorb 10 to 15 litres of water), potentially damaging both the topper and the machine. Mattress Miracle at 441½ West Street in Brantford recommends foam topper care that extends product life. Brad’s advice: vacuum your foam topper monthly with an upholstery attachment, spot-clean stains immediately with a damp cloth and mild detergent, and deodorize with baking soda every 3 months. A waterproof topper cover eliminates most cleaning situations entirely and costs less than one professional cleaning session. Call Talia at (519) 770-0001.
Brad, Owner, 40+ years of experience: "Every customer's situation is different. We have been helping Brantford families find the right mattress for over 37 years, and we are always happy to answer questions in person at our showroom on West Street."
8 min read
Can you wash a Hush mattress topper?
Hush mattress toppers use a bamboo-polyester blend cover that is machine washable. Remove the cover and wash on a gentle, cold cycle; the inner foam layer does not go in the washing machine. Spot-clean the foam with mild dish soap diluted in cool water, blot with a clean cloth, then air-dry for at least 24-48 hours before replacing the cover. This matters beyond convenience: Asthma Canada and the Canadian Lung Association recommend regular bedding washing to reduce dust mite allergens, which accumulate in foam and fabric over time and can worsen respiratory symptoms during sleep. Check the care label on your specific Hush model - materials vary by product line. The general rule for any foam topper holds here: the cover is washable, the foam is not. For a long-term hygiene layer, our Quilted Luxury Mattress Protector is washable and designed to slip on and off in seconds.
How do you clean a covered foam mattress?
A covered foam mattress (where the foam layer is encased in a fitted cover) is cleaned the same way as a foam topper: unzip and remove the cover for machine washing, and spot-clean the foam itself. The Canadian Lung Association recommends washing mattress covers and protectors at 60°C (140°F) every one to two months to kill dust mites - but check your cover's care label first, as some bamboo or rayon blends require cooler wash cycles to avoid shrinkage. Talia, who handles bedding questions at our Brantford showroom, suggests pairing a foam mattress with a separate zippered allergen-barrier cover on top of any built-in cover. Layered covers extend foam lifespan and make weekly washing realistic - most people will not unzip and remove a built-in cover that often, but a separate top cover comes off in seconds. For protector options that fit foam mattresses see our best mattress protector Canada guide.
What is the best cool mattress topper available in Canada?
The best cool mattress toppers for Canadian buyers fall into three categories: gel-infused memory foam (most affordable, mild cooling), latex (naturally breathable, durable, mid-priced), and phase-change material toppers (active cooling, premium price). Honest framing matters here - most "cooling" toppers improve heat conductivity modestly compared to standard memory foam; they do not actively cool the room. The Canadian Sleep Society notes that body temperature drop is a normal part of sleep onset, and bedding that traps heat can interrupt this process. Dorothy, our Sleep Specialist, often recommends customers test their current setup first: a thinner topper plus breathable cotton sheets often runs cooler than a thicker "cooling" topper alone. We carry latex and gel-foam options at the Brantford showroom - see our bamboo mattress and topper guide for naturally cooler options, or call (519) 770-0001 to ask about current stock. See the cornerstone best mattress topper in Canada for the full topper category overview.
How do I clean a Bedstory mattress topper or similar Amazon-bought foam topper, and are they worth keeping?
Bedstory is one of several Amazon-only foam topper brands (alongside Linenspa, Lucid, and ViscoSoft) selling 2 to 4-inch memory foam toppers in the $89 to $249 range. Cleaning instructions follow the same rules as any foam topper: never machine wash the foam itself, remove and machine-wash the zippered cover separately, vacuum the foam surface, spot clean stains with diluted mild detergent on a damp cloth, deodorize with baking soda for 8 to 12 hours, then vacuum. Whether they are worth keeping comes down to foam density. Most Bedstory and similar Amazon foam toppers use 2.5 to 3.0 PCF (pounds per cubic foot) memory foam, which is on the lower end of what holds up over time. Talia, who pairs Brantford customers with toppers and replacement covers, says: "Bedstory and similar Amazon brands are fine for guest beds and short-term use. For nightly use over five-plus years, you want at least 3.5 PCF foam, which is closer to what specialty mattress retailers carry." A 2015 study published in Sleep Health by Radwan and colleagues found that medium-firm sleep surfaces produced statistically significant improvements in back pain and sleep quality, but cheaper foam loses pressure-distribution properties faster than higher-density foam. Browse our topper collection for higher-density alternatives, or read our best mattress topper in Canada guide for foam-density specifics.
What is a matelas en foam and how do you care for it?
A matelas en foam (foam mattress) uses layers of memory foam, polyfoam, or latex as its core support instead of innerspring coils. Foam mattresses conform closely to the body and isolate motion well. To care for one, rotate it every three months, use a waterproof mattress protector, and spot-clean spills promptly since foam cannot be submerged in water.
Visit Our Brantford Showroom
We are located at 441½ West Street in downtown Brantford. Free parking available. Our team does not work on commission, so you get honest advice based on your needs.
Mattress Miracle , 441½ West Street, Brantford, ON , (519) 770-0001
Hours: Monday–Wednesday 10am–6pm, Thursday–Friday 10am–7pm, Saturday 10am–5pm, Sunday 12pm–4pm.
When your foam topper is ready to be replaced, come in and we will help you choose one with a washable cover built in , so the next cleaning is a matter of minutes, not hours.
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We are a family-owned mattress store in Brantford, helping our community sleep better since 1997. Come try mattresses in person and get honest, no-pressure advice.
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