Removes dirt, grease and residue on glass and prevents spots that can be left after drying. Skin-friendly and non-toxic. One premeasured tablet mixes easily with water to make 2.5 gallons of window cleaner. Doesn't leave a film. Application: Window Cleaning; Applicable Material: Glass; Chemical Compound: Sodium Carbonate; Citric Acid; Dirt Types: Hard-Water Stains; Lime Scale; Mineral Deposits; Rust; Soap Scum.