Window Privacy Film Use Steps:Step 01. Keep Window or Glass cleanStep 02. Wet the Window or Glass with water(Soapy water will be the best choice)Step 03. Remove from backing protect film(which is a kind of clear vinyl, please MAKE SURE remove it before you apply the window film to glass)Step 04. Apply to wet glass and smooth with handsStep 05. Squeegee away water and air bubbles.Seller Tips:1. The static cling effect of the film may not be good if the glass is not clean. Solution: Before application, use the towel to make it clean2. Fit for a smooth surface without any dust or fiber.3. Do not apply to windows with cracks.4. More efficient in teamwork, a product of energy-saving and environmentally friendly.5. Affix tape on both sides to remove the window film from the backing film.*Only Applies on Smooth Glass Surfaces*Key Notice For Frosted Window Decor:1. If you want to remove it, simply peel the window film from any corner. It comes off cleanly without leaving residue2. When not in use, the film must be replaced and stored on the original backing film. The side of the film that touched the glass should face the glossy side of the backing film3. Our film does not apply to carved, over a frosted or irregular glassFrosted Window Film Q&A:Q: How long will this film last?A: In normal condition, it will last for more than 8 years on the windowQ:Why there is bubbles inside?A:Because the water is not cleaned out entirly. After you position the film, please smooth out the film with squeegee, make the air bubbles and water out completelyQ:Could this film be used for more than one times?A:Yes, but the stickup side of the film must be completely clean