You know I somehow missed that humidifier.. I don't use that kind. What I'd do is make a humidity chamber. It's essentially a plastic container with a lid (like a small tupperware, or margarine tub - whatever) with a hole cut in the side or top so the snake can get inside it. The container has a bit of moist sphagnum moss in it. If you do a search for 'humid hide' you'll come up with a ton of links on here.