Notice: This No-glue film is only for smooth glass.Can not fit to frosted glass or art glass. Installation Step 1. Measure windows and trim film; Step 2. Clean glass, then wet glass with soapy water(or just clear water also work well); Step 3. Affix taps on both sides to remove the transparent backing film.( which is a kind of clear vinyl, please MAKE SURE remove it before you apply the window film to glass); Step 4. Apply to wet glass and smooth with a smooth tool,such as a credit card or a spatula,or hands; Step 5. Squeegee away water and air bubbles; Step 6. Cut off the margins. Q&A Q1: Why my film do not stay? A: Have not wet the window with water, or have not remove the transparent backing film. S: Remove the transparent backing film, and then wet the window with soapy water. Q2: I have removed the back film and wet the widow, why still can not stay? A: You apply the wrong side. The film is divided into two layers, one side is smooth, and the other side is rough. S: Tear it off and retry another side to paste again. Q3: There are a large number of small bubbles. A: Too less water. S: Tear it down, spray a lot of water and paste it again. Tips for Installation: 1.A clean and smooth glass surface without any dust, fiber or any kind of texture is needed. 2. The transparent back cover must be peeled off; otherwise, the film will fall off when the water is dry. 3. Do not apply to the window frame. Cut off excessive edges after application if needed. 4. The film may be a little tough and its adhesive effect will be impacted in winter. Solution: use hair dryer or warm water to soft it.