Mr Muscle knows cleaning should be as easy as possible, which is why he's created a single product for all of your window cleaning needs. Mr Muscle 5in1 Window & Glass Cleaner is scientifically formulated with 5-in-1 technology, giving you the power to defeat tough messes on windows and glass. Do not use on finished wood or on surfaces other than glass, mirrors and tiles. Chrome test on an inconspicuous area first.