Air the bedding

The best time to air your sheets is on a waning moon on fruit days (Aries, Leo, Sagittarius).
The bedding can respire better and so can your body while sleeping. Furthermore it helps to keep the house dust mite in check. Try to avoid to air the bedding on waxing moon in a water sign (Cancer, Scorpio, Pisces). Those days enhance the chance to keep the humidity in the sheets.