Humidity??

[steveboos]

for the most part you really shouldn't have to worry to much about humidity just keep a humid hide on in the cage with either a damp paper towel or some damp sphagnum moss

Yeah this^^^^ is most important, but i would have it vary from 40-60% to have good consistent sheds. Having it go lower every now and again wont hurt, it would help it feel more like their natural habitat.