Your Steam Cleaner is designed to clean hard surfaces and upholstery that will withstand high heat. Do not use on soft plastics and cold glass. On surfaces that have been treated with wax or some no wax floors, the sheen may be removed by the heat and steam action. Do not use on unsealed wood. This could cause the wood grain to rise. It is therefore recommended to test an isolated area of the surface to be cleaned before proceeding.