How to Clean Every Type of Pillow Without Ruining It

A pillow that has never been washed is, to put it plainly, a sponge with a year of your life in it. Sweat, face oils, drool, and skin cells soak through the pillowcase into the fill, where they feed dust mites and slowly yellow the fabric. I've cut open two-year-old unwashed pillows for a story before. I will not describe what I found, except to say it motivated a washing schedule I keep to this day.

The good news: most pillows can be washed at home. The catch is that the right method depends entirely on what's inside, and the wrong method — usually a hot wash or a half-finished dry cycle — is how pillows die in the laundry room. Before any of the steps below, check the care label. When the label and this guide disagree, the label wins.

Before you wash: two rules that save pillows

Rule one: wash two pillows at a time. A single pillow unbalances a top-loading drum and beats itself against the agitator. Two pillows balance the load and cushion each other. Front-loaders are gentler, but the two-pillow rule still helps.

Rule two: plan for the dry before you start the wash. A thoroughly wet pillow needs one to three hours in a dryer on low heat, or a full day of air-drying. If you can't commit to drying completely, wait for a day when you can. Mildew inside a pillow is a replacement-level event — there's no rescuing it. (And if your pillow is past saving, our guide on how often to replace pillows will help you time the upgrade.)

Down, feather, and polyester: the machine-washables

These are the easy ones. Use a front-loader or a top-loader without an agitator if possible. Warm water, a gentle cycle, and a small amount of mild liquid detergent — about a tablespoon. Powder detergent and too much soap of any kind leave residue that clumps the fill. Run an extra rinse cycle; leftover detergent is the main reason washed pillows come out lumpy.

Drying is where the care happens. Low heat, and add two or three wool dryer balls or clean tennis balls — they pummel the fill back to loft as it dries. Pause every 30 minutes to pull the pillows out and hand-fluff, breaking up clumps. Expect 60–90 minutes for polyester and up to two hours for down. The pillow must be bone-dry in the center; squeeze the middle hard and feel for any cool, dense spots. Those are damp. Keep drying.

Memory foam and latex: hands off the machine

Solid foam pillows cannot go in the washing machine. The agitation tears the foam, and the spin cycle can crack it outright. Foam also holds water like a marine sponge, which makes machine drying a mildew factory.

Instead, wash the removable cover per its label — most are machine-washable — and clean the foam core by hand. Vacuum the surface first with an upholstery attachment to pull out dust and skin cells; this step alone removes a surprising amount of the load, and for low-soil pillows it can be the whole cleaning. For stains and odors, spot-clean with a cloth dampened in a mix of cool water and a drop of mild detergent, then blot with a dry towel. For a deeper refresh, fill a tub with cool soapy water, submerge the pillow, and squeeze the water through it gently — press, never wring or twist. Rinse the same way until the water runs clear.

Drying foam takes patience: press between towels to extract water, then lay flat on a drying rack in a ventilated room or outside in the shade (direct sun degrades foam). Rotate every few hours. A fan pointed at it cuts the time significantly. Plan on 24 hours, and do not put it back on the bed until the center is completely dry.

Buckwheat, and a note on silk

Buckwheat pillows are the special case: the hulls must never get wet. Unzip the case, pour the hulls into a bowl or bag, and machine-wash the empty case. While it washes, spread the hulls on a baking sheet in the sun for a few hours — sunlight and air freshen them without water. Replace the hulls when they start feeling dusty or flat, typically once a year.

Silk pillowcases need their own gentle handling: cold water, a mesh bag, silk-safe detergent, and air-drying away from sun. If you sleep on silk for its hair and skin benefits — we cover those in our silk pillowcase guide — a Mulberry silk pillowcase washed this way will stay smooth for years instead of months.

The schedule that keeps pillows out of the danger zone

Wash pillowcases weekly with your sheets. Wash or spot-clean pillows two to four times a year — mark the change of seasons if you need a trigger. And between washes, give pillows a daily fluff and a monthly hour near an open window; airflow does more for freshness than any spray.

The highest-leverage habit, though, is prevention. A zippered pillow protector under the case blocks the sweat and oil from ever reaching the fill, which doubles the time between washes and extends the pillow's life. Protectors and cases are cheap; pillows are not.

One group should tighten this schedule: allergy sufferers. If dust-mite allergies are part of your life, wash the pillow monthly in water at least 130°F where the fill allows it (polyester handles this; down prefers warm; foam gets the spot-clean routine plus monthly vacuuming), and use an allergen-proof protector with a sealed zipper, not just a fabric sleeve. The difference in morning congestion can be noticeable within a couple of weeks.

The bottom line

Match the method to the fill: machine for down and polyester, hands-only for foam and latex, sun for buckwheat hulls. Wash two at a time, go easy on detergent, and dry completely — the center of the pillow, not just the surface. Do that on a seasonal schedule and your pillows will stay fresh, supportive, and mite-unfriendly for their full lifespan, which our replacement guide puts at one to three years depending on fill. And if yours are already past the point of rescue, the CalmEden store has replacements organized by sleep position. Clean pillows are nice. The right clean pillows are better.