Blue Wonder Limescale Cleaner is a highly concentrated cleaning fluid, suitable to descale and clean basins, toilets, shower doors, mirrors, baths, taps, glass screens, tiles and much more. Usage Instructions: Spray onto a damp cloth and wipe the surface to be cleaned. For stubborn dirt, leave to work for a few minutes before removing with a damp cloth. Wipe with clean water if required, to prevent streaks. Tested on an inconspicuous area using a damp cloth. Remove spilled product immediately with water to prevent damage. Do not use Blue Wonder Limescale Cleaner on acid-sensitive surfaces such as marble, travertine or acid-sensitive stone.