When I do an iPad repair I try to reframe from touching the LCD at all so there are no finger marks on it at all. And then just blow the glass chips off and wipe quickly with microfiber cloth. But once in a while I get a fingerprint mark on it. What is the best way to clean it and what solutions used? I tried windex and it works but it seems to change the color of the LCD. Please Let me know how you guys go about cleaning it. Thanks