After you soak him in warm water for a few minutes, the skin should soften or loosen up. When it does, take a towel or washcloth, get it wet with warm water, and use it to slowly and gently work the skin off. Sometimes, just the snake crawling through the towel or cloth will get the skin off and sometimes you have to apply a slight bit of pressure. The goal is to work the skin off, not rip it off...