Windows with film applied are easily cleaned without damage to their appearance as long as a few common-sense guidelines are followed:
Use a soft clean cloth, soft paper towel, or clean synthetic sponge.
Use a soft cloth for drying the window.
Use any ammonia free glass cleaning solution that contains no abrasive materials.
The availability of scratch-resistant coatings as a standard feature of quality films has virtually eliminated the need for extra special precautions in cleaning.