How to Clean a Mattress Topper (and Whether You Can Wash It)

To clean a mattress topper, check the care tag first, because the method depends on the type. A foam or memory-foam topper is spot-cleaned and air-dried and must never go in the washer, while many fiberfill or feather toppers can be machine-washed on a gentle, cold cycle. Whichever you have, vacuum it, spot-treat stains with cold water, deodorize with baking soda, and dry it completely before it goes back on the bed.

The most common question, and the one that trips people up, is simply whether you can throw the thing in the wash. This guide answers that by type, then walks through spot-cleaning a foam topper, machine-washing a fiberfill or feather one, and the drying step that makes or breaks the whole job.

Can you wash a mattress topper?

It comes down to what the topper is made of, and the care tag is the final word:

• Foam and memory foam. No. Foam tears apart in a washing machine and soaks up water it cannot release, so it is spot-cleaned only, never washed or tumble-dried.
• Fiberfill and down-alternative. Usually yes, on a gentle, cold cycle with a mild detergent, if the tag allows and the topper fits your machine with room to move.
• Feather and down. Often washable on gentle and cold, but they need thorough drying to avoid clumping and mildew, so check the tag carefully.
• Wool. Usually spot-clean and air only, since washing can mat and shrink it.

How to spot-clean a foam topper

Foam is the most common topper and the one that has to be cleaned by hand. Work with as little moisture as possible:

• Wash the cover. If the topper has a removable, washable cover, strip it and launder it per its tag.
• Vacuum both sides. Lift dust, dead skin and dander off the foam with an upholstery attachment.
• Spot-treat stains. Blot stains with cold water and a little mild dish soap. For sweat, urine or blood, use cold water and an enzyme cleaner, which breaks the protein down at the source. Blot, do not soak.
• Deodorize. Sprinkle baking soda over the topper, leave it an hour or two, then vacuum it off to pull out odor.
• Air dry fully. Let the foam dry completely before it goes anywhere near the bed.

Washing a fiberfill or feather topper

If the tag says machine-washable, keep it gentle. Use a gentle, cold cycle and a mild detergent, and do not overload the machine, since the topper needs room to move to actually get clean. Skip bleach and fabric softener. For drying, use low or no heat, and for a feather or down-alternative topper, add a couple of dryer balls and run it long enough to dry the filling all the way through, because a topper that is still damp in the middle will clump and mildew. When in doubt, air dry.

Dry it completely

This is the step that decides whether cleaning helps or backfires. A topper, and foam especially, holds moisture, and one that goes back on the bed damp becomes a mildew problem hidden under your sheets. Air dry it flat or draped with airflow on both sides, use a fan, and give foam a day or more if it needs it. The Environmental Protection Agency notes that mold takes hold in damp material within 24 to 48 hours, which happens fast in Florida humidity, so bone dry is the standard before the topper goes back on.

When to clean the mattress or replace the topper

A topper is there to protect the mattress, but stains and sweat usually soak through to the mattress underneath, so when the topper needs cleaning the mattress often does too. That part is worth handing to a professional, who can treat, extract and dry a mattress properly. The topper itself is a simpler call: a foam topper that is crumbling, will not dry out, or has deep urine soaked all the way through is often cheaper and healthier to replace than to rescue, since toppers cost a fraction of the mattress they sit on.

At Pink Upholstery Cleaning we clean and sanitize the mattress under your topper for homes across Orlando, treating what has soaked through and drying it so it is fresh to sleep on. Our mattress cleaning service handles it, and every quote is free.