Your pillow should be washed every six months and replaced every year or two, says the National Sleep Foundation. The reason to wash: Dust mites. They can worsen allergies and asthma, impairing your breathing and worsening your sleep. The reason to replace: Feathers go flat, and foam degrades with age. Over half of us experience neck pain as we get older, which could be alleviated by purchasing a pillow that properly cradles your head and neck.
Recommendation: Both down and foam pillows can be washed in a regular washing machine. Put them in a separate load and make sure they dry completely so they don’t develop mold. Throw some tennis balls or dryer balls in the dryer to help.