I'm also having the same problem with my male, Alister. His last shed he retained a piece on his head/neck, and this shed it seems to have gotten stuck in the same place. I've tried soaking him a couple times and the pillowcase method, but nothing seems to be working. I have a water dish big enough for him to soak in, as well as a humidifier in the room (I live in a dry area where the average is about 30% humidity).

I'm starting to get worried, surely this can't be good for him? The skin looks so uncomfortable! Are there any other tips or tricks that haven't been mentioned here already?