I tried everything imaginable. everything from reptile capet, to aspen, to home baked double milled cypress mulch. and everything store bought I could find.

The hands down winner... what i will use for the rest of my life for all my snakes....

NEWSPAPER!

I use it in my tubs and in my tanks. It has little to no effect on humidity, so once you get the other factors right (ventilation, heat source, size of water bowl, location of water bowl) you will not need to mist, or worry about humidity at all.

My snakes are ALWAYS clean. when one pees or poops, it takes less then a minute for the tank / tub to be brand new again.

Do yourself a favor. try newspaper for 2 weeks. then experiment with the other stuff.... you will figure it out!