How you clean a pillow depends entirely on what is inside it. Down, down alternative, and polyester pillows are machine washable on a gentle, warm cycle, washed in pairs, with only a little detergent. Memory foam and latex pillows must never go in the washing machine, since agitation tears the foam apart. Spot clean or hand wash those instead, then air dry. Always check the care tag first.

The single biggest mistake people make is using one method for every pillow. That is how a supportive memory foam pillow ends up shredded in the drum. This guide sorts the process by filling, then tackles the yellowing question everyone actually searches for.

What is the golden rule for washing pillows?

The filling dictates the method. Before anything else, strip the pillowcase and any protector and read the care tag. The tag overrides every general tip below, because manufacturers know their own materials.

Once you know the filling, match it to the right approach:

How do you machine wash down and polyester pillows?

These are the easy ones, but a few details keep them from clumping or knocking your machine off balance.

1. Pretreat stains. Dab an enzyme-based stain remover or a little detergent on visible spots. Work it in with a soft brush and wait about 15 minutes.
2. Wash in pairs. Put two pillows in at once, on opposite sides, to keep the machine balanced during the spin. A front loader or a top loader without a center agitator is gentler and gives them room to move.
3. Use less detergent than you think. A couple of teaspoons is plenty. Too much leaves residue that traps odor.
4. Pick the cycle. Gentle cycle, warm or cold water, highest water level. Add a second rinse to flush out all the soap.
5. Dry thoroughly. Tumble dry on low. Toss in a few dryer balls or clean tennis balls to break up clumps and refluff the filling. Down dries slower than synthetic, so give it time. A damp pillow grows mildew.

The pair rule matters more than it sounds. A single soaked pillow throws the spin cycle badly off balance and can bang the drum.

How do you clean memory foam and latex pillows without ruining them?

Foam is the opposite story. A washer’s twisting motion and a dryer’s heat break the foam’s structure and destroy its support. So you clean these by hand.

For odor and general freshening:

1. Remove the cover and wash that separately.
2. Vacuum the foam with an upholstery or brush attachment to lift dust, hair, and allergens.
3. Sprinkle baking soda over the surface and let it sit for at least an hour to absorb odor.
4. Vacuum the baking soda away. Flip and repeat on the other side.

For stains:

1. Mix a little gentle, bleach-free detergent into lukewarm water.
2. Dip a clean white cloth and gently rub from the outside of the stain toward the center, moving to a clean part of the cloth as it lifts.
3. Blot with a cloth dipped in plain water to rinse the soap.
4. Press out excess moisture and air dry fully, ideally on a breezy, warm day. Foam holds water and dries slowly, so allow four to six hours or more before the cover goes back on.

Shredded memory foam is the exception. If the tag allows, you can sometimes machine wash it inside its inner lining on the most delicate setting, then air dry.

Why do pillows turn yellow, and how do you whiten them?

That yellow tint is not dirt in the usual sense. It is oxidized sweat and body oils that soak into the filling over time. Regular detergent alone often cannot break it down.

For washable pillows (down, down alternative, polyester):

• Add half a cup of baking soda to the drum alongside your detergent to fight yellowing.
• For stubborn discoloration, some people add white vinegar to the rinse, which dissolves the sweat residues behind the yellowing. Never combine it with bleach.
• Wash on the warmest setting the tag allows, with a second rinse.
• Dry in sunlight when you can. UV light naturally brightens and deodorizes.

For foam pillows, skip the whitening washes entirely. A little surface yellowing on foam is normal and does not affect performance. Do not soak or bleach it. Spot clean and air it out instead.

A note of caution seen across cleaning communities: harsh whitening hacks that work on cotton bedding can wreck delicate fillings. Match the trick to the material.

How often should you wash your pillows?

Pillows need washing more often than most people assume, because they absorb sweat, oils, and skin cells nightly.

Using a washable protector under the pillowcase is the single best habit for keeping the pillow itself clean longer.

What do sleep and cleaning experts recommend?

Advice that shows up consistently from mattress makers, pro cleaners, and bedding communities:

• Always check the tag first. Pro cleaners repeat this as the one non-negotiable step.
• Vacuum foam pillows regularly to pull out dust and allergens between deeper cleans.
• Air pillows out without a case every couple of weeks to release trapped moisture.
• Never store a damp pillow. Mold in a pillow is far harder to fix than to prevent.
• Spot clean spills immediately, before they set and oxidize.

Frequently asked questions

Can you put pillows in the washing machine?

Down, down alternative, and polyester pillows, yes. Solid memory foam and latex pillows, no. They must be hand cleaned.

How do you dry pillows without clumping?

Tumble dry on low with dryer balls or tennis balls to refluff the filling, and make sure the pillow is completely dry before use.

Can you wash memory foam pillows?

Not in a machine. Spot clean or gently hand wash, then air dry fully. Vacuuming and baking soda handle most odor.

How do you get yellow stains out of pillows?

For washable pillows, add baking soda to the wash and dry in sunlight. For foam, spot clean only and accept that mild yellowing is normal.

How often should you replace a pillow?

Even with good care, most pillows are due for replacement every one to three years, depending on type and support.