Achtung! The Antibacterial cases, do not need to be cleaned. If they are cleaned with alcohol wipes, the protective layer can be damaged and it won't work properly.
1. make sure you clean the screen of your phone well and wipe off all the little dust particles.
2. Then slowly place the glass on the center of the screen, watch out for the camera area, and if you have a button, that the opening line up well.
3. After placing the glass, slightly press in the middle of the screen and you can slowly watch how the air is pushed out from underneath. In this step, you can stop the glass from sticking if you notice something underneath and try again.