Rather than increase the overall humidity of an enclosure I place a moist hide in with them. Mix of peat moss and sphagnum, damp but not wet. If they want the humidity, especially when sloughing they can crawl in there. It's amazing how much time they will actually spend in there.
I find this works a treat with small elapid species too and negates many of the shedding issues.
I find this works a treat with small elapid species too and negates many of the shedding issues.