1. Clean and remove all dust from the rear camera lens with the included cleaner. 2. Grab the release sheet by the handle and remove it from the camera glass. 3. Hold the guide frame and attach the camera glass in its proper alignment. 4. Wipe down with a dry cloth and gently press the adhesive areas to secure. Remove the guide frame to finish. Only compatible with cases with open camera cutouts! Cases that cover the camera lenses or only provide cutouts for the circular lens alone may not be compatible with this product.