Pumie Power works when the strongest chemicals quit. Its miraculous cleansing ability is well known to professionals. Food service chefs, painters, plumbers, farmers, mechanics, pool servicers, the industrial cleaning and maintenance trade all depend on the abrasive cleaning action of pumice to remove baked-on food and grease, water and acid stains, rock-hard mineral deposits, paint, rust, lime and other substances from hard surfaces.Safe for hands. Safe for children. Contains no harsh detergents or other chemicals.Pumie® works best in the presence of a liquid: water, oil or acid. First wet the stick. Then rub the edge of the stick on the surface you wish to clean using back and forth strokes. The paste buildup helps to clean and polish. Wash cleaned surface of residue. To clean stick hold under water faucet.