How to Wash Pillows: Down, Synthetic, and Memory Foam

How to wash pillows depends on what's inside them. Down and synthetic pillows go right in the washing machine. Memory foam pillows never do. Water and heat break the foam down. Ezi Home Services hears this question often. Most people wash the pillowcase but skip the pillow itself for months, sometimes years. Here's how to clean every pillow type the right way, and how often to do it.

Why a pillowcase wash isn't enough

A pillow used for two years can hold hundreds of thousands of dust mites, per the Asthma Society of Canada. Mites feed on shed skin flakes. A pillow collects plenty of those every night. Mite waste is a common trigger for asthma. It also triggers allergic rhinitis, the stuffy nose and sneezing that disrupt sleep for many people.

Water above 55°C to 60°C kills dust mites in bedding, per the same guidance. A cooler wash, around 40°C, cuts mite numbers but doesn't wipe them out. The case blocks some buildup. But mites and their waste still work into the fill underneath over time. Dust in the room makes it worse. Here's why your bedroom keeps getting dusty and how to stop it.

How often to wash pillows

Wash pillows every three to six months. Wash pillowcases weekly, on the hottest setting the fabric allows. Replace pillows entirely every 18 to 24 months. Fill breaks down by then, and no wash restores the original loft.

People with allergies may want to wash more often, closer to every three months. A pillow protector under the case adds another barrier. It also cuts down how often the pillow itself needs a full wash. For more ways to cut triggers, see our guide to cleaning changes that cut allergens at home.

Washing down and feather pillows

Down and feather pillows handle a full wash. But the technique matters more than with regular laundry.

1. Check the load size. Wash no more than two pillows at once so they have room to rinse clean.
2. Use a front-loading machine if you have one. A top-loader's centre post can tear the fabric shell.
3. Choose the gentle cycle with cool or warm water. Add a small amount of mild, low-suds soap. Too much soap leaves residue that clumps the down.
4. Run an extra rinse cycle. This clears out leftover soap that would stiffen the feathers.
5. Dry on low heat with dryer balls or clean tennis balls. These break up clumps as the down dries. Check every 20 minutes. Keep drying until the pillow is dry all the way through, not just on the outside.

Never wring or twist a wet down pillow. That crushes the feather structure for good. A pillow stored even slightly damp risks mould and a musty smell that won't wash out later.

Washing synthetic and polyester pillows

Synthetic-fill pillows are the easiest of the bunch. Most take a warm or hot machine wash with regular detergent. Stick to two pillows per load to keep the wash balanced. Run a second rinse cycle here too. Polyester fill traps soap almost as much as down does.

Dry on low or medium heat. Toss in a couple of dryer balls to stop the fill from balling up in one corner. Fluff the pillow by hand now and then during the cycle. Confirm it's bone dry before it goes back on the bed.

Cleaning memory foam pillows

Memory foam is where the "just wash it" instinct backfires. A washer's spin cycle and a dryer's heat both break down the foam's structure. That leaves a pillow flatter and less supportive than before, per Sleep Foundation guidance on foam care. Skip the machine for the foam itself, every time.

Spot clean it instead:

1. Mix a small amount of mild soap into lukewarm water.
2. Dip a clean cloth in the mix and blot the stain. Don't scrub. Foam tears more easily than fabric.
3. Wipe the spot again with a clean, damp cloth to rinse the soap out.
4. Pat with a dry towel to pull out extra water. Then lay the pillow flat somewhere well-aired to dry all the way.

Many shredded foam pillows come with a separate, washable cover. Check the care tag first. If there's a removable cover, wash that on its own using the steps above for synthetic pillows. Spot clean only the foam piece inside.

Spot cleaning decorative pillows

Throw pillows on a couch or bed usually aren't built for a full wash. This goes double for covers made from velvet, silk, or other delicate cloth. Spot clean these the same way as memory foam. Use a damp cloth, a small amount of mild soap, and a gentle blot, not a scrub.

If the cover's tag says it's washable, pull it off and wash it apart from the insert. Use cold water and a gentle cycle to protect the colour and shape. Never machine-dry a delicate cover. Let it air-dry flat instead so it keeps its size.

Getting stains out before you wash

Treat stains before any wash cycle. This goes for down, synthetic, or a cover you've pulled off. Sweat stains respond well to a paste of baking soda and water. Leave it on the spot for 15 minutes before washing. For a set-in yellow mark, mix equal parts hydrogen peroxide and dish soap. Dab it on and leave it 30 minutes. It lifts most of the mark before the wash finishes the job.

Never mix a hydrogen peroxide treatment with bleach. Combining bleach and peroxide releases fumes that irritate the eyes and lungs. Use one or the other, never both on the same load.

Why the care tag comes first

Every tip above is a general guide, not a fixed rule. The best way to know if a pillow can go in the machine is its own care tag. Fill blends and inner build vary between brands, even within the same fill type. When a tag says "spot clean only," that beats any general advice, this guide included.

When to call in a professional

Washing pillows is a simple DIY task. But it's one more item on a long list during a full home clean. If baseboards, grout, and appliances also need work, a scheduled deep clean covers it all in one visit. Ezi's vetted pros already know which fabric needs which approach. For the routine clean between deep cleans, general house cleaning keeps the bedroom, and the rest of the home, in the same shape.

The bottom line

Wash down and synthetic pillows every three to six months in the machine. Use a gentle cycle and dryer balls to stop clumping. Never machine-wash memory foam. Spot clean it with a damp cloth and mild soap instead. Replace any pillow after 18 to 24 months, no matter how well you care for it. The fill breaks down past that point either way. Check the care tag before any wash. It always beats general advice like this. For the rest of the home, Ezi's house cleaning services bring the right method for every surface and fabric.