beautiful shell but problem with screen protectors

The transparent shell can be easily and quickly adapted to the mobile phone. On the screen protectors, however, was a paper sticker, which had to be removed from the outside after bonding the film and this could be removed only with great difficulty, there were paper and adhesive residue on the screen protector, the film had to therefore clean, so to speak again. After 5 - 6 times and brush clean the film was finally clean. That was the only downside, therefore I am annoyed that I have the protective sheath ordered with the display foil and therefore have paid the higher price, I could have saved me.