i think jsut cuz im used to keeping humidity up in my cham cages that its not a big deal to me. jjust some good substrate and like a tiny tiny warm mist every morning shoots the humidity up to 65% or so and by the end o the day its only come down to 52-49% and thats with a smaller water bowl for my BPs. With a bigger water bowl im sure it would be even less. And when in doubt i can just make another cardboard/tin foil 1/2 cage cover and put it over the water and with that i only noticed a 5% humidity drop in 24 hours