Multipurpose Cooktop Cleaner is a soft liquid cleaner with many cleaning uses: Glass-ceramic cooking surfaces: safe and effective on cold or cool (not hot) surfaces. For stubborn stains, soak for several minutes before rubbing. Stainless steel & porcelain sinks, tubs and tile: Removes soap scum and hard water mineral deposits. Chrome, copper, brass: removes metal tarnish. For brushed surfaces, polish in the direction of brush lines. Important: Do not use on gold, silver or pewter. To prevent scratching glass, fiberglass, plastic or porcelain-enamel surfaces on refrigerators and other appliances, use sparingly and rub gently with damp sponge. Contains no phosphates.