Thoroughly clean your screen using a lint free cloth. Dust and dirt on the screen are the main reason bubbles appear under the film. Remove about 1 inch of the backing from the screen protector, being careful not to touch the back. Align the screen protector with the top edge of the device screen, starting with a corner and moving across horizontally. Press the screen protector gently and steadily onto the screen surface as you peel the backing away. Gently slide a credit card or similar tool over the surface of the screen guard as you apply it. Remove any bubbles by pressing them out to the edge.