1. Shut down your laptop and clean your laptop touchpad thoroughly with a slightly damp cloth.
2. Slowly peel away the back of the protection skin, start applying the skin from the top part of laptop touchpad area. Take note to align the skin corner carefully.
3. Smooth down and flatten the surface of the film slowly by using a credit card or something similar.
If your touchpad skin is larger then your touchpad and require a trim, please follow instruction as video below: