Memory foam pillows can't go in the washing machine - agitation tears the foam. Here's how to safely hand-wash, spot-clean, and deodorize yours so it stays fresh for years.
Memory foam doesn't act like cotton or down. The cells trap water like a sponge, and the agitation cycle of a washing machine literally tears the foam apart - which is why every major manufacturer (Tempur-Pedic, Purple, Sleep Foundation, The Spruce) tells you to hand-wash only. The good news: with a tub, mild detergent, and patience, you can deep-clean a memory foam pillow in about 30 minutes of active work plus a 24-hour dry. This guide walks you through the safe hand-wash method, faster spot-clean and deodorize routines, and the mistakes that ruin pillows.
No. Never put a solid or shredded memory foam pillow in a washing machine or dryer. Both the spin cycle and tumble heat will rip the cellular structure, leaving you with a lumpy, water-logged pillow that never fully dries - a perfect environment for mildew. Only the removable cover is machine-washable (cold, gentle, mild detergent). The foam itself stays out.
For 90% of stains and routine freshening, spot-cleaning is safer and faster than a full soak. Use it for sweat marks, drool, makeup, or food spills caught early.
Reserve this for visible yellowing, lingering odors, or after illness. Plan for a 24-hour drying window.
Run lukewarm water until the pillow can fully submerge - usually 4-6 inches. Add 1 teaspoon of mild detergent per gallon and swirl to dissolve. Skip bleach, fabric softener, and oxygen-based brighteners; they break down polyurethane foam.
Lower the pillow in and gently press it under water. Squeeze with flat palms - never twist or wring - to push soapy water through the foam. Repeat for 5-10 minutes until the water around the pillow turns slightly cloudy.
Drain the tub and refill with clean lukewarm water. Press the pillow to flush soap out, drain, and refill again. Plan on 3-4 rinses; soap residue left in the foam attracts dirt and feels gummy when dry.
Lift the pillow with both hands underneath - a soaked memory foam pillow can weigh 10+ pounds and tear under its own weight. Press it between two clean towels on the floor (stand on the sandwich if needed) to wick out as much water as possible. Skip the spin cycle and the wringing motion entirely.
Lay the pillow flat on a slatted drying rack, two chairs, or a clean towel - anywhere air can reach both sides. Point a box fan at it and flip every 4 hours. Avoid direct sunlight (UV degrades foam) and never use a clothes dryer, hair dryer, or radiator. The pillow must be 100% dry inside before you sleep on it; trapped moisture leads to mildew and a musty smell that's almost impossible to remove.
If the pillow smells but isn't visibly soiled, skip the soak and deodorize instead:
An hour of indirect sunlight on a screened porch - not full sun - also helps neutralize odors without breaking down the foam.
Liquid spills are the trickiest scenario because foam wicks fast. The first 60 seconds matter:
For protein-based spills (blood, urine, vomit), substitute the detergent with a 50/50 mix of cold water and white vinegar - enzymes from soap can set protein stains.
Pull it out before the spin cycle if you can. Press out water between towels and air-dry flat for 48-72 hours under a fan. If the foam is shredded, lumpy, or smells musty after drying, replace it - washed-out memory foam loses pressure-relief properties permanently.
Some shredded-foam pillows have removable inner bags whose contents can be machine-washed on a delicate cycle inside a mesh laundry bag - check the care tag. If there's no inner bag, treat shredded foam exactly like solid foam: spot-clean or hand-wash only.
Memory foam pillows last 18-36 months. Replace yours if it stays compressed after fluffing, smells musty after a deep clean, has visible foam crumbling, or no longer supports your neck without folding it in half. Washing won't restore lost loft.
No. Heat above 110°F breaks down the polyurethane bonds in memory foam, leaving the surface brittle. A cool, oscillating fan is the only safe accelerator.
A waterproof pillow protector under your normal pillowcase blocks the sweat, oils, and drool that drive 95% of pillow stains. Wash the protector on cold every two weeks, and your foam pillow may only need one deep hand-wash per year. That's the trade most sleep editors make - including ours.
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Banner Mattress EditorialThe Banner Mattress editorial team publishes independent mattress reviews, buying guides, and sleep-health advice. Since 2018 we've tested 1,000+ mattresses and 3,000+ pillows, sheets, and bedding accessories in our review lab - every recommendation is hands-on, never sourced from vendor talking points. Affiliate links may earn us a commission, but never change what we recommend.
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