The glass must be as clean and dust free as possible. Fill the bottle with clean water, filtered water is better if available.
Baby shampoo is a pure soap and only soap is recomended.
The tint film is applied to the interior side of the window, so move away any furniture that may be getting in your way. Remove all obstructions from the work area, such as window blinds, plants and knicknacs. Decals may be tinted over if desired, otherwise remove them with your razorblade scraper tool. You will want to be able to spray generous amounts of water on the window, so you may want to cover the floor with a clean and dust-free towel or drop cloth. Spray the solution on the glass and carefully scrape the entire glass with the razorblade scraper tool of your choice.