Hi,
Try what BMM said,I think thats a good idea. I always keep a small plastic ( depending on the size of the snake ) container with damp moss in my snake vivs. This way they can go and come as they please. My snakes live in it at shedding time.
After doing what BMM said check your snake out very well. Make sure that all the skin has come off all the way down to the very tip of the tail.
I hope this helps,
Jimmy C.