Most pillows can go in the dryer on low heat, but memory foam and buckwheat pillows should stay out since heat can melt or warp them.
A pillow that has gone flat or lumpy often just needs a trip through the dryer, not a trip to the trash.
But "pillow" covers wildly different materials, from down and polyester fiberfill to foam and buckwheat hulls, and each one reacts to heat differently.
Add two or three clean tennis balls or dedicated dryer balls to break up clumps as the filling tumbles. Run on low heat for 30 to 45 minutes, checking and fluffing by hand every 15 minutes so the filling redistributes evenly instead of settling into one corner.
A pillow can feel dry on the outside while still holding moisture in the center, especially thicker down pillows. Squeeze the middle after drying; if it feels cool or heavy, run another 15 to 20 minute cycle. Mildew can start growing within 24 to 48 hours inside a pillow that stays damp, and the smell rarely comes out once it sets in.
High heat is the biggest one, since it can scorch the ticking fabric or, on foam pillows, cause permanent warping and an odd chemical smell. Overloading the dryer with three or four large pillows at once also blocks air circulation, so the pillows in the middle stay damp long after the outer ones feel dry. Skipping the tennis balls is another common miss, since without them fiberfill tends to clump into hard lumps that do not fully smooth back out.
Look for a tumble-dry symbol on the sewn-in tag before starting, since some decorative or specialty pillows list dry-clean only despite looking like a standard bed pillow. Bed pillows without a visible tag are usually safe on low heat if the filling is down, feather, or polyester, but throw pillows with foam inserts or delicate covers often are not, so treat an unlabeled pillow cautiously rather than assuming it is dryer-safe. When unsure, run a short 10-minute low-heat test and check for melting smell, warping, or clumping before a full cycle.
Down and synthetic-fill pillows dry well on low heat with a couple of tennis balls to keep them fluffy. Foam and buckwheat pillows should stay out of the dryer entirely and air-dry instead.
Usually 30 to 45 minutes on low heat, though down pillows can take up to an hour. Check every 15 minutes and fluff by hand.
No. Heat breaks down the foam's structure permanently, leaving it crumbly or misshapen. Air-dry memory foam away from direct heat or sun instead.
It usually means moisture was trapped inside. Run another low-heat cycle and squeeze the center; it should feel light and warm, not damp.
You can wash pillows with sheets, but dry them separately when possible since pillows need longer, lower-heat cycles than lightweight bedding.