At first I had difficulty sticking the screen protector. Often came dust on the adhesive surface and I had to reach for a new slide. In my review of the Customer mumbi reported to me. This gave me a few tips for proper application of the film. For example, the screen protector in the bathroom and stick previously run there warm water, so the dust settles on the water vapor can bind. Through this assistance, I managed to stick the film on the first try. Especially helpful I find the films on the back of my iPhones 5s, because the housing is made of aluminum, it's very prone to scratches. The protective film prevents this and protect my phone perfectly. Would buy again at any time. Good product and great customer service!