Get a cheap tupperware, gladware, or deli cup with a lid (Big enough to fit your snake and a rag.), take off the lid, turn it upside down, cut a doghouse style hole in it, get a clean rag, run it under hot water from your faucet, then wring it out until you get all the water out.
Now put it inside the tupperware, put the lid on, and put it inside your corn's enclosure, near the warm side, but not under the hot spot. Don't put your snake in there, just let him find it.
Your corn will prolly hang out in there for a day or 2.
After he's been in there a day or 2, take him out and double check that his tail shed is gone.
If it's still there, draw a bath for him with 82-84 degree water, just an inch of water is fine, and let him swim around a bit. He'll prolly freak out at first.
Then hang out with him for a few minutes in there, and kinda let him slide through your fingers, and gently (With wet hands) see if the little piece of shed will roll off in your hand as the snake goes through your fingers.
If not, just give it a few more minutes and try again.
This time just try and ease it off gently with your thumb and forefinger, and it will prolly come right off.