I put on a temporary horrible screen protector until I got my nice clearprotector in the post. Anyway when I removed the temp one it left a sticky residue that a microfibre cloth would not move. I used 50% isopropyl alcohol and water and that still did not do it as it left smears. So I got brave and used 100% isopropyl alcohol and it worked a treat. It removed the icky stuff and left the screen like new. It evaporated itself with no smears and did not damage the screen at all. It really is great stuff. Then I just wiped it down with the supplied cloth and it was as clean as clean before putting on the clear protector.