Step 1. Stick it to the glass when you are ready.If you need some water, just spray it with a mist and stick it if not needed. Step 2. Press air with a squeegee to prevent air bubbles from entering the glass while sticking.Bubbles are always easy to get in, so if you dont have a squeegee, you can have a substitute for you. Finally, cut out the protruding part with a cutter and youre done! It is convenient to use a ruler when it is difficult to cut. Note: Touching the adhesive surface will weaken the adhesive strength, so please do not touch it as much as possible. Dirt on the surface will weaken the adhesive.When you remove the film, there may be some marks on the surface of the glass. It will not stick to any uneven surface such as mesh glass, wired glass, hot ray absorbing glass, hot ray reflective glass, vacuum glass, double layer glass, special glass of sail and other glass that is applied to daily or scratches.