plans on the screen

[Kyniu]

Hi, I have a problem with the screen, after removing the protective glass there have been spots that I can not remove. Does anyone have such a problem and knows how to get rid of it or change the screen?

[Strampke]

Here are the warnings.

Maybe a drop of sunflower oil or a touch of butter and whipe it off gently.

The tip that one often sees is to use peanut butter.