Her water bowl was bone dry and I use an Accurite dual hydrometer/thermometer with a probe for the hotside. The humidity stays between 45%-50% always unless she is in shed and thats when I spray the tank to bump it up. Hot side is between 90-92 and cool side ambient is in the 80's by way of repti heat cable (attached to a dimmer) run through the rack because of how cold my roommates keep the apartment. The heat cable will dry the rack out which is why i usually keep the water on the hot side to counteract this. She has been on paper towels for the last 1.5-2 months due to a rat bite and my putting neosporin on her twice a day for at least a week. She was just put back on aspen last night because it holds humidity better and is easier for a shed imo.
I use a Zoomed heating pad connected to a reptitemp 500r thermostat until I get a Herpstat pro. She was kept in a 50 quart tub measuring 33X19X7 inside of a melamine rack but I just had new custom rack built and switched her last night to a 41 quart tub (35X16X6)
Temps upon my arrival: 78.1 cold, 89.8 hot. I didn't check humidity because it wasn't my first concern when I saw the paper towels and knocked off thermometer. Now I wish I had.
When I came back last night everything, including water bowl, was bone dry. I left Tuesday and came back Friday night so I'm assuming it happened Tuesday night/Wednesday sometime. I'm thinking it may be dehydration but it could also be shed.