always a little problem during installation

this is a very good screen protector that knows how to forget. The cut is almost perfect (a little play on the sides, but it's better for certain protective shell. The cuts are rounded to not injured. Top.
two small problems however, I find that there is a lot of fingerprints (but is that of the screen protector or my fingers?)
and I have once again, failed to place it perfectly straight.
In fact, it is one of the laying technique that is best, but we must be careful to be properly aligned before pressing and holding a little glass to not slide when it is pressed. The trouble is, as is glass, it breaks easily if you try to remove it to begin again, allowed to protect a little crooked, it's not too serious.