We currently use Glass Gleam 3, made by Titan Laboratories in the USA. It uses a formulation designed specifically for professional window cleaners, with super low concentration ratios. 1ml of detergent for every 1.28L of water is all we need to clean internal glass.
Unlike dish soaps, GG-3 leaves no residue, won’t foam up on you, stays wetter on hot and windy days and won’t leave white marks when dry. Bio-degradable and USDA approved. Designed specifically for cleaning glass and window films using a squeegee.
Download the MSDS:
Glass Gleam 3 MSDS