I searched, I read a bunch of threads but Im asking anyway.

Cleo is in a 15 quart tub, on papertowel with 2 hides (one of which is also a water bowl) that is all there is room for in there. I mist 2xs a day to try and keep humidity up. Temp on hot side is about 92 and ambient temps are between 78-80. Humidity however is great when i mist but falls after a few hours, this wouldnt be a problem if i didnt have that pesky thing called work that takes me out of the house 9 hours a day.
So, my question/s should I change substrate? Aspen, cypress, coconut? Im sure i can get any at the pet stores around here or from my breeder. But in the meantime how should I raise the humidity? Or should I just keep on how we are? I wont be able to go get any till saturday.

Im switching her to a bigger home once I find place for it in my house and finish making the hides. So Im assuming whatever I use to up humidity in the other tub I should use in this one. How many holes should I put in the new tub? its 32q.