Then .. just without film

Sure, it's always tricky to get a screen protector on the phone, especially without dust inclusions. I have also never experienced that this has already worked in the first film, the problem with this film is that it is sufficiently precise cut, which has virtually no room for maneuver when placing.
Of course you can clean the film theory and try several times, but it's almost impossible to get them dry.
Having invested about 2 hours of my life, both films were unusable and went in the trash.
Conclusion: Without totally dust-free environment is difficult to handle, the first attempt should sit. The latitude in laying is too low, a tiny deviation ranges, and the edge of the film is no longer present. So no recommendation from me for this film.