About This It really works removing hard water stain accumulation. For persistent and stubborn corrosion or etching damage, you will need to follow our special instructions to restore that surface damage by scanning the QR code on the product label or by simply rubbing in a smaller 3 inch circle, using more product on your cleaning towel and applying more pressure on the surface in your scrubbing efforts. Biodegradable formula produces no smelly or harmful fumes. Trusted by professionals and homeowners for daily and regular cleaning of shower doors, windows, stainless steel, chrome, porcelain and granite surfaces without worries. A powerful concentrated hard water stain remover for the kitchen and bathroom. The Simple Cleaning Solution® for hard water stain removal on window glass, shower door glass, automotive windshield glass, porcelain sinks, porcelian tile, glass tile, porcelain tubs, porcelain toilets, granite countertops, stainless steel sinks. Not for use on painted or plastic surfaces.
