try to remove screen protector,if still doesn't work try to perform factory reset.backup all data before your pc or something.
Sent from my LG-D802 using xda app-developers app
D802 LG G2 32GB White G3 Rom By OptimusRs 1.1 Powered By Awesome Dori's 5.8 Kernel
(its not a phone.. ITS A MONSTER PHONE!) JB Antutu:36659 KitKat Antutu:26800-34624 Points.
R800i Xperia Play@1.2Mhz smartassV2 TrueAncestors ICS ROM
Lupus Kernel antutu 8056 points.