I have a Moto E 2nd Gen and there is a small, faint smudge on the LCD that appears to be a dead or stuck pixel? It is only visible on a black screen but there is a literal smudge of green about an inch long and maybe 2 cm wide; 3/4 way down and to the left of the screen. Is not a dead pixel because the area responds to colors normally. It is only visible when the area is black but is like a smudge or swipe of a fingerprint? Could this be impact damage?