Our Bac-Outs bio-enzymatic cleaning power removes the toughest stains, odors and messes from your bathroom. From soap scum to mold or mildew, Bac-Out works wonders on tubs, tile, toilets, countertops, sinks and floors. The only thing left behind will be a natural Lavender and Lime essence, never harsh fumes or residue. It safely cleans and deodorizes. Bac-Out contains live enzyme cultures that break down stains and odors into tiny particles.