Problems removing 1 stuck shed piece

[David339]

My corn snake (hatchling) had a shed issue his last shed. It seems it tore or something while he was shedding and i came home and saw he had like a little bit of shed stuck to the top of his head. I got all but one piece off which is between his eyes. I used a warm wet washcloth and have tried mineral oil. It's been a few weeks and I'm not having any success. I can get the back edge to peel a little but other than that it won't come off and it's a delicate area so I'm trying to be super gentle. I haven't been trying everyday, maybe 1-2 times a week because I won't handle him after he's eaten and it's stressing him so I end up giving up. Doesn't this HAVE to be removed before he sheds again or can I leave it? All his other sheds have been perfect.