Using our window film is a breeze. First, clean the window surface well to make sure it's dirt - free. Then measure the window and cut the film with a bit of extra on each side for easy fitting. Fill a spray bottle with water. Spray the window and peel the backing film off from one short side. Place the film on the window and use a squeegee to get rid of water and bubbles. Wipe up the remaining water with a towel and trim the edges. When it's cold, heat the film with a hair dryer to make it more flexible. Remember, this film only works on flat, clean, and smooth windows. You can attach scotch tape to the back side to remove the backing quickly. To maintain it, just clean it with a soft cloth and mild cleaner. You can reuse the film multiple times, so if you want to move it to another window or use it later, simply remove it carefully without leaving any residue. Enjoy the privacy and energy - saving benefits this film brings to your home!