Most balls don't like to soak, but having a container large enough for them to do so gives them the option. I have a spider who likes to soak when he's opaque...none of my other snakes do. My humidity's fine, and I use a spray bottle to wet them down once a day when they go opaque. No bad sheds.

Very good tutorial here. One note, though: I dont' recommend leaving the washcloth in with the snake while it soaks. It's a sure bed that the snake will pee in the water if you do (Murphy's Law). lol