theres not much else you can do. if you want you can peel the skin off yourself after a good soak. they sell a liquid on the internet somewhere thats made to get off extra skin. i havent used it but you could look into it if you wanted. if you snake doesnt finish its shed it isnt the end of the world. but consecutive bad shed might be a problem.
while you guys are answering his questions..i have one too. does stress cause bad sheds?