I have a 27" iMac that fell under the 1TB drive recall. I took it in and had the drive replaced. However, there were fingerprints and palmprints all over the screen. After trying to get them off, I realized that most are on the other side of the glass AND on the actual LCD inside, as well as a bit of dust. Before I buy a suction cup to remove the glass, is it possible to clean the actual LCD with a liquid, or will it damage the LCD?