Most people wash their pillowcases weekly but never wash the pillow inside — yet the average pillow doubles in weight over two years from accumulated sweat, dead skin cells, dust mites, and their waste products. The right washing method depends on the fill type: down and synthetic pillows are machine washable; memory foam pillows cannot go in the washer or dryer; latex pillows require hand washing. This guide covers pillows and duvets by fill type with the correct method for each, plus how to dry everything completely — the most important and most neglected step.
What You’ll Need
- Washing machine (large capacity preferred) — for down and synthetic pillows
- Mild detergent (low-suds, like Woolite or similar) — standard detergent creates too much foam in large bedding loads
- 2–3 clean tennis balls or dryer balls — for fluffing pillows and duvets during drying to prevent clumping
- Bathtub — for hand-washing memory foam and latex pillows
- Towels (several large) — for blotting excess water from foam pillows
- Duvet cover (for duvets) — protects the duvet and reduces washing frequency
Safety and Precautions
- Never put memory foam in a washer or dryer. The agitation tears the foam structure, and heat causes it to break apart. Memory foam must be hand-washed and air-dried flat.
- Never dry a pillow on high heat with polyester fill — high heat melts synthetic fibers and permanently destroys the pillow’s structure.
- Do not put a pillow back on the bed until completely dry inside. A pillow that is dry on the outside but still damp inside will grow mold in the fill within 24 to 48 hours.
- Check the care label before washing. Some specialty pillows (latex, buckwheat, water fill) have specific restrictions that override general guidance.
How to Wash Down and Feather Pillows
Use a Large-Capacity Washing Machine on Gentle
Wash two pillows at once in a front-load or top-load washer (without agitator). Washing in pairs keeps the load balanced. Use the delicate or gentle cycle with warm water. Add only a small amount of mild, low-suds detergent — about half the amount you would normally use. Excess suds are very difficult to fully rinse from down fill and leave a soapy residue that flattens loft.
Run an Extra Rinse Cycle
After the wash cycle, run a second rinse to ensure all detergent is removed. Down pillows that still have detergent residue after washing will smell musty and feel flat.
Dry with Tennis Balls on Low Heat
Place the pillows in the dryer with two to three clean tennis balls or dryer balls. Use the low heat setting. Dry for 60 to 90 minutes. Stop every 20 to 30 minutes and manually break up any clumps of wet down with your hands. Down clumps together when wet and must be redistributed throughout the drying process or it will dry in uneven lumps that ruin the pillow’s comfort. The pillow should feel completely dry with no cool or dense spots before removing from the dryer — this may take two or more full dryer cycles.
How to Wash Synthetic (Polyester) Pillows
Polyester fill pillows are the easiest to clean. Wash on the gentle cycle with warm water and mild detergent. Dry on low heat with dryer balls. Synthetic fill dries faster than down but is more prone to permanent clumping if heat is too high. Check for lumpy spots after the first drying cycle and break them up by hand before a second cycle if needed. Polyester pillows that have developed hard, irregular lumps from heat or repeated washing are at the end of their useful life — no amount of washing will restore the original fill distribution.
How to Wash Memory Foam Pillows
Spot Clean the Surface
For minor stains, apply a small amount of mild detergent diluted in water to a cloth and blot the stained area. Never apply liquid directly to foam. Blot dry immediately and allow the surface to air dry completely before using.
Hand Wash in the Bathtub for Full Cleaning
Fill the bathtub with cool or lukewarm water and add a small amount of mild detergent. Submerge the pillow and gently squeeze water through it repeatedly for several minutes. Drain the soapy water, then refill with clean cool water and continue squeezing to rinse out detergent. Repeat the rinse cycle at least three times until no soap bubbles appear when squeezing. The rinsing is the most critical step — trapped detergent in foam causes an unpleasant smell and accelerates breakdown of the foam material.
Dry Flat, Never in Dryer
After washing, gently press (do not twist or wring) water out of the foam by squeezing, then lay flat on several dry towels. Roll the pillow in the towels to absorb more moisture. Reshape and place on a drying rack or clean surface in a well-ventilated area. Allow 24 to 48 hours to dry completely. A fan directed at the pillow significantly speeds drying. The pillow must be bone dry throughout its thickness before returning to use — press firmly on multiple areas to verify no cool damp spots remain.
How to Wash a Duvet or Comforter
Check Capacity — You May Need a Laundromat
A king or queen duvet (comforter) typically requires a washing machine with at least 4.5 cubic feet of drum capacity to wash properly. Forcing a large duvet into a small machine compresses the fill, prevents thorough washing, and can overload the motor. If your home machine is not large enough, a commercial front-loader at a laundromat (typically 7 to 8 cubic feet) will do the job properly.
Use Low Detergent on Gentle Cycle
Use a tiny amount of mild liquid detergent — about 1 tablespoon for a full comforter. Too much detergent will not fully rinse out of dense fill material and leaves a heavy, flat duvet. Wash on the delicate/gentle cycle with warm water. Add an extra rinse cycle.
Dry Thoroughly with Dryer Balls
This is the most critical step. Dry on low heat with three to four dryer balls or tennis balls. A queen comforter typically requires 2 to 3 dryer cycles (60 minutes each) to dry completely. After each cycle, remove and manually fluff and break up any clumped fill. The interior of a duvet that appears dry on the outside can still be damp inside — press firmly throughout the entire duvet to check. Mold inside a duvet cannot be remediated; the duvet must be discarded.
How Often to Wash Pillows and Bedding
| Item | Washing Frequency | Notes |
|---|---|---|
| Pillowcases | Weekly | Most frequently needed — direct contact with face, hair, oils |
| Pillow protectors | Monthly | Protects pillow interior; reduces pillow washing frequency |
| Pillows | Every 3–6 months | More frequently if no pillow protector is used |
| Sheets and flat sheets | Weekly to bi-weekly | More frequent in summer or with night sweats |
| Duvet/comforter | Every 3–6 months | Use a duvet cover to reduce washing frequency |
| Duvet cover | Weekly to bi-weekly | Acts as a washable cover for the duvet |
When to Replace Pillows
No amount of washing restores a pillow that has physically deteriorated. Replace pillows when they: no longer return to their original shape after folding in half; smell musty even after washing and complete drying; have visible yellowing or staining that penetrated the ticking (pillow cover fabric); or feel lumpy, uneven, or provide noticeably less support than when new. The general replacement guideline is every 1 to 2 years for polyester, every 2 to 3 years for down, and every 3 to 5 years for high-quality memory foam or latex.
For related bedroom hygiene, see our complete mattress cleaning guide and our laundry room cleaning tips for managing all household bedding effectively.
Frequently Asked Questions
Can you put pillows in the dryer without washing them?
Yes — running pillows through a 20-minute dryer cycle on low heat once a month helps refresh them by killing dust mites and releasing trapped moisture. This does not replace washing but extends the interval between full washes. Use dryer balls during this cycle to fluff the fill.
How do you get yellow stains out of pillows?
Yellow staining is caused by accumulated sweat and body oil. Pre-treat with a paste of baking soda, hydrogen peroxide, and dish soap before washing. Let the paste sit on the stained areas for 30 minutes, then launder as usual. Multiple treatments may be needed for old staining, and some yellowing in the ticking fabric is permanent after years of accumulation.
Can I wash a down pillow in the washing machine?
Yes — down pillows are machine washable on a gentle cycle with mild, low-suds detergent. The critical step is drying: down must be dried completely on low heat with dryer balls, stopping periodically to break up clumps. Damp down smells musty and will grow mold if the pillow is put back in use before fully dry throughout.
How do I wash a duvet cover?
Wash duvet covers as you would regular sheets — on a normal cycle with regular detergent. Turn the cover inside out before washing to prevent pilling on the visible exterior. Most duvet covers can be tumble dried on low heat or air dried.
Why do my pillows smell even after washing?
The most common cause is inadequate drying — the interior fill is still damp when the pillowcase goes back on. Mold and mildew in partially-dried fill produces a persistent musty smell that returns even after re-washing. Dry for longer with dryer balls, checking that no cool or dense spots remain before finishing.
Conclusion
Clean pillows and bedding directly impact sleep quality and bedroom air quality. The most important rule across all pillow types is complete drying — a pillow that is damp inside when returned to use will develop mold that cannot be removed. Using pillow protectors and duvet covers reduces the frequency of full washing and extends the life of your bedding significantly. Include pillow and duvet washing in your seasonal cleaning schedule for consistent bedroom hygiene maintenance.
