The Bissell Steam Sponge is safe and effective on virtually all sealed hard surfaces. Use the Steam Sponge to remove tough stains and grime from countertops, sinks, stove tops, mirrors and windows. You can also use the included attachments to scrub tile grout and to help remove stains from bathtubs and shower stalls. The Steam Sponge allows you to safely and effectively clean without the fumes and residue of harsh chemicals. The Steam Sponge is great for an overall cleaning in those hard to reach areas.