Yes, burnishing pads need to be cleaned. Eventually they will collect residue and floor finish, causing a build-up which will cut swirls into the floor finish. Since the floor type, floor finish, burnish pad density and machine conditions all vary, some pads will run longer than others before they load up. It is always best to check the condition of the pad before each use. You can clean with a hot water hose using ... — Gary Clipperton, president, National Pro Clean Corp.