Bose QuietComfort Earbuds should be cleaned after every use by gently wiping the buds dry. Be careful not to allow any moisture to enter the earbuds through the ports. In addition, make sure that you do not force any dirt or debris into the ports. Do not blow air into or vacuum the ports or nozzle.For a more thorough cleaning, remove the eartips from the earbud, then rinse with water and a mild detergent. Allow the eartips to dry completely before reattaching them to the earbuds. The eartips should be resistant to dirt or the effects of UV radiation, which typically cause some colour change. With normal use, the appearance of the tips should remain unchanged through years of use.