We spend a third of our lives on our bedding, leaving behind 56 hours a week of sweat, body oil and dead skin cells. So how often should we be washing away that funk, and what's the best way to do so?

Wash linen sheets every one to two weeks using a gentle cycle and cool to lukewarm water to preserve the fibers and prevent shrinkage. Avoid fabric softeners; instead, use wool dryer balls and remove ...