iPhone 4 screen protector issue

Hello guys!

So I had this iPhone screen protector from Cellular Line for a couple of months and some days ago I decided to remove it. I did remove it and I realized that the protector screwed up my glass. Now all the fingerprints and little touches I do on the phone's glass get too much visible. This happens on the whole area of the glass exept on a little spot by the front camera that the protector didn't cover. So I'm thinking that some kind of glue or something must still be in my iPhone. I tried cleaning it various times but it's worthless.

Can you guys tell me if this is normal? Anyone had problems like mine? Do you know how to solve this?

Thanks for now

Try cleaning it with an alcohol wipe or something.

Thanks for the advice but it also doesn't work. Anything I do it just stays the same