Owners Manual
Page 121
.... If you are wearing gloves, if your hands are not clean while touching the touch screen or if you attach a screen protector or optional accessories to close apps or turn the device off and then on again. The touch screen may not function properly. Reset all important data stored in the device. -- If you... device freezes or hangs, you must sign in humid conditions or when exposed to the same Google account after resetting the device. If the touch screen is scratched or damaged, contact the LG Authorized Service Center.
.... If you are wearing gloves, if your hands are not clean while touching the touch screen or if you attach a screen protector or optional accessories to close apps or turn the device off and then on again. The touch screen may not function properly. Reset all important data stored in the device. -- If you... device freezes or hangs, you must sign in humid conditions or when exposed to the same Google account after resetting the device. If the touch screen is scratched or damaged, contact the LG Authorized Service Center.