Believe it or not, your pillow can absorb a lot of moisture if you’re resting your face on it regularly, thanks to sweat and, yes, drool. Leaving it outside in the sun for a bit can help evaporate any excess moisture that’s locked in and restore it to its once fluffy state, says Homer. Just make sure not to leave it out in humid weather—that could actually make things worse.
“When in doubt, make sure the pillow is fully laundered and dried in a proper dryer,” says Homer. “Then put it outside for a sunbath a final freshening step, if desired.”