Carefully rinse the feeder bottle you wish to clean. If there is a residue build-up, a solution of vinegar and water can be used to remove it. Moisten the mop head thoroughly before using. The galvanized wire handle will bend to accommodate various feeders. Foam Feeder Cleaning Mop, Fits Inside All Perky Pet Feeding Bottles, Also Fits Most Feeding Bases, Makes Cleaning Less Of A Chore.