Can a Memory Foam Mattress Be Cleaned? What to Avoid

Yes, it can be cleaned, but it can't be washed like laundry. A zippered cover can usually go in the machine according to its care label. The foam core itself, memory foam included, should never be soaked, machine washed, heat-dried or left in strong sun. The safe options are vacuuming, spot cleaning with suds and very little moisture, or professional low-moisture extraction.

Foam is porous. It soaks up water like a giant sponge and releases it very slowly. Memory foam is also heat-sensitive, softening as it warms and firming up as it cools. That makes water and heat the two things to avoid most when you clean it.

In our guide to cleaning a natural latex mattress, we covered how to care for latex. This article focuses on what's different about foam: why it hates water and heat, what to avoid, how to clean it safely and when to call a professional.

Many people assume foam and latex mattresses are cleaned the same way because they feel similar. In reality they react differently to water and heat, so the approach needs to differ too:

If you have a latex mattress, follow the separate steps in our latex mattress cleaning guide. Everything below applies to foam, memory foam and layered foam mattresses.

A thick foam layer can take in a lot of water in seconds. The surface may feel dry after a few hours, while the inside stays damp much longer. You can't tell whether it's truly dry just by touching the top.

Memory foam is designed to soften with body heat. Steam, hair dryers, irons or strong sun can deform it in spots, roughen the surface or reduce its bounce. Direct sunlight also makes foam yellow faster.

Ho Chi Minh City's heat and humidity, especially in the rainy season or in apartment bedrooms with little airflow, slow drying even more. Moisture that lingers inside the foam can cause sour, musty smells and hidden mold. If you already see mold spots, read can a moldy mattress be cleaned.

Wet foam gets much heavier and weaker. Pulling it by a corner, folding it or wringing it out can tear the foam or separate the glued layers. That kind of damage usually can't be repaired.

These are the mistakes our technicians see most often when people clean foam mattresses themselves. Most come from habits that work for cotton mattresses or clothing.

A washing machine's spin can tear foam apart, and soaking leaves the core so saturated it's almost impossible to dry fully at home. Only a zippered cover belongs in the machine, following its label.

Spraying too much solution drives water deep and spreads the stain into a ring. A stiff brush can fray the cover fabric and tear the thin foam layer underneath. Dab gently with a cloth instead of scrubbing.

These are common ways to speed up drying or "sanitize," but they're the worst for memory foam. Heat deforms the foam, and steam pushes even more moisture into the core. Fans and natural airflow are much safer.

Strong bleach and solvents such as gasoline or concentrated alcohol can make foam crumbly, discolor it and leave a lingering smell. Stick to diluted dish soap or a pH-neutral cleaner, and test a hidden corner first.

A closed cover traps moisture in the core, and the mattress can start to smell within days. Wait until it no longer feels cool or damp anywhere, including the underside, before you zip the cover back on and make the bed.

These steps work for routine upkeep and small, fresh stains. The rule throughout: as little moisture as possible, and no heat.

Strip the bed and wash the cover per its label if it comes off. Vacuum both sides with a soft brush attachment without pressing hard. If there's a mild odor, sprinkle a thin layer of baking soda, leave it a few hours, then vacuum it up.

Mix a few drops of dish soap into cool water and whip up some suds. Dab only the suds onto the stain, working from the outside in. Then lay a dry towel on top and press firmly to draw moisture out, repeating until the towel barely gets damp. With foam, pressing works better than wiping, because the water sits inside, not just on the surface.

Open the windows and run a fan or your air conditioner's dry mode. Raise the mattress on a slatted base so the underside gets air. Don't stand a foam mattress on its edge for long, since soft foam can sag out of shape.

DIY cleaning is fine for upkeep and small marks. It's time to call a professional if any of these apply:

When we arrive, our technician checks the label, the type of foam and the mattress's condition before starting. We vacuum, pre-treat stains with a pH-neutral solution, then use an extraction machine on a low-moisture setting to pull dirt out without soaking the foam. We don't use steam on memory foam, and we'll show you how to let the mattress finish drying afterward.

We're also upfront about the limits: stains and odors usually improve noticeably, but foam that has yellowed with age, sagged or started to crumble can't be restored by cleaning. Mattress cleaning at home costs 300,000 VND for mattresses under 1.0 m wide, 350,000 VND for 1.2–1.4 m, 400,000 VND for 1.6–1.8 m and 450,000–500,000 VND for 2.0–2.2 m. The final price depends on the material and its condition; send photos on WhatsApp or Zalo at +84 357 111 566 for an accurate quote before we start. See the full breakdown in our mattress cleaning cost guide.

If your foam mattress has had a spill, smells off or has old stains, send a photo of the mattress and its label on WhatsApp or Zalo at +84 357 111 566, and Thuan High Clean will review it and quote before any work, with no hidden fees. We clean mattresses at home across Ho Chi Minh City (Saigon) from 8:00 AM to 5:00 PM, with a free re-clean within 3 days if any odor remains.