Rubber and silicone bands are some of the easiest bands to clean. Simply use lukewarm water on a soft cloth to clear off any dirt, grime, perspiration or salt and chemicals off of it and dry it with another soft cloth. This is especially important to do after swimming, as salt water and chlorine can cause the band to deteriorate and crack. It is also suggested that you avoid any astringents such as rubbing alcohol or acetone for this reason. Perfumes, aftershave, hairspray and similar products should not come into contact with the band, as they can stain and discolor it. Some places also sell rubber protectant to keep the strap soft and pliable, and to help prevent cracks.