When i come across an animal that has stuck shed at work. (Since it is a reptile shop and we cant have animals in tubs. we have to make do with glass tanks) I will usually mist down the warm side once a day and if that fails. Get a bit of sphagnum moss. Wet it nice and place it in the hide with the snake till they come out of blue and shed. Works prefect even for my snakes.
Edit. Also i need pictures~ lol I don't know. makes the whole process of learning this new trick more fun with visual ahah