Hi, I could not get rid of those saliva marks on the screen by using several microfiber cloths. So, I used iKlear Apple Polish bought from an Apple store about 10 years ago to clean the screen of the MBP 16" like I did for about 3 times in the past. This time, it created some kind of stain on the screen as if somebody were using a finger to rub on it. Could you please let me know how to get rid of those stains and make the screen looks like new again? Thanks