Gather the necessary cleaning supplies: You'll need a soft cloth or sponge, a mild soap or detergent, and water.
Test the cleaning solution: Test the cleaning solution on a small, inconspicuous area of the film to make sure it doesn't damage or discolor the film.
Prepare the cleaning solution: Mix a small amount of mild soap or detergent with warm water.
Clean the window: Use the soft cloth or sponge to gently clean the window, starting at the top and working your way down. Be sure to avoid using any abrasive or harsh cleaners that could damage the film.
Rinse the window: Use a clean, damp cloth to rinse the window and remove any soap residue.
Dry the window: Use a soft, dry cloth to gently dry the window, being careful not to scratch or damage the film.