I'd think if you damage the eye, that's it. All i do for bad sheds... run a towel under warm water. Place towel in snake's tub, on top of the snake. Take up most of the tub with the towel so the snake is forced to rub on it. (if the snake is in a tank, put it in a tub for this) The snake will take care of the rest. This has never NOT worked for me.