Use a hook to take the snake out. I have found that it is usually in first taking hold of the snake that problems with biting arise. You can make one out of an old coat hanger, (no sharp edges!).
Also, with time the snake should calm down if you make it regular and learn the "do's and don't's". For instance, be careful of the head area when picking it up, this startles them.
Also, if you took a picture of the enclosure, and told us temperatures, etc, we could tell you if this snake would be benefited by a change of environment. It sounds like you are just coming into snake keeping and may appreciate a few pointers.
Good luck, snakes are great.