You have had him long enough that I would assume any dehydration that occurred before you got him would not be a problem. That's a great humidity level. Is the entire enclosure 90f or does he have temperature gradients?8-9 months and he's in a closed chamber tub. Temp in the 90's humidity always above 95%. He does have a teracata saucer to drink from at all times. I soak 1-2 times a day but I have been working crazy shifts at wrk and I haven't had a chance to soak him the last two days.