I decided to clean my screen with 64% isopropyl alcohol on a microfibre cloth and now the screen isn't as smooth as it was before. When I drag my fingers across the screen I get friction burn. The apple website says it's okay to use 70% to clean your Apple device's screen so I'm not sure what I did wrong. I've heard that the oleophobic coating can wear off and if you want to replace that coating you have to get your screen replaced. But according to a source isopropyl will not wear the coating. Anyone know what could be the problem?