A well-tanned cowhide will last for many years. Eventually, the hair might become a little worn, but that will only lend itself to authenticity. It can be cleaned. The basic technique is to sponge up any liquid spills as quickly as possible. Scrape off any hard stuff, going in the direction of the hair. Then spritz it with a mild cleaner approved for furry leather. Rub the fur in all sorts of directions to get the last of the spill or stain out, then using a soft brush, groom the hair in the direction in which it grew naturally. Allow it to dry away from sunlight or strong heat.