Hey all, I have been reading up a lot on this forum and getting some input on a few things in regards to one of my Viv's, but am wanting to know the best way to monitor and maintain the 2 Viv's.

Viv 1 : Whites Tree Frogs

18x18x24 Exo Terra
Coco substrate
Styrofoam background that was included in the terrarium on purchase
12x18 Zoo-Med Corkboard
4 fake plants for hiding spots
2 Grapewood pieces for climbing and aesthetics
Sphagnum moss
2 small water dishes with dechlorinated water
Screen top with half covered by plastic wrap
2 domes on top, one with a 60W Blue day bulb and a 60W Red nightlight (for heat and viewing)
2 small 10-20 Gallon range heating pads on side

The two domes on top are set on a timer at 12/12
One heating pad stays on all day and the other only comes on for 12 hours during the day to raise the daytime temps

I have successfully managed and maintained the temperature in the Viv to be around 72 at night and around 83-85 during the day

I am having trouble with my humidity though. What are the suggested percentages for humidity for a healthy happy WTF? How do you maintain that level throughout the day and night? Right now I mist a couple of times during the day, but if I am at work or during the night when I am asleep and not able to mist right then it drops very low. The lowest I have seen it drop overnight or while I am at work is down to 20%, which I know is not good for them. Any and all suggestions on this Viv are very much appreciated! Thank you in advance.

Viv 2 : Powder Blues

12x12x18 Zoo-Med
Gravel base layer, Jungle Mix mid layer, Repti Bark top layer
Sphagnum moss
2 Live plants
1 piece of sterilized driftwood (bought from an aquatics/reptile store)
1 Small water dish with dechlorinated water
2 12" Zoo-Med fitted hoods. One with a daytime 5.0 UVB bulb and one with a nighttime red 60W bulb

The two hoods are set on a timer at 12/12
The temp in the Viv stays around 70-73 throughout the day and night

The humidity in the Viv is also a battle. I thought that keeping the gravel layer on the very bottom would have helped maintain the humidity in this Viv, but it too drops if it goes sharply unmisted for a few hours. Not nearly as sharply as the WTF VIV above, but enough where it goes below the suggested 70%-100% humidity levels preferred by tincs. Since there are two hoods on the top of the Viv that cover the entire screen top, how do I keep a decent humidity level throughout the day without having to mist every couple of hours since I'm at work some of the day and asleep at night?

Any and all help with these two setups is much appreciated. I have read a lot of info on this forum, and it is a little overwhelming with the differences depending on the thread you read as to what the best way to go about a Viv is, but I would love any help given. I just want to make sure my little guys/gals stay happy and healthy. Side note, the tincs seem to be doing very well. They feed on their fruit flies like velociraptors and hop around sporadically during the day and night. The tree frogs seem to stick to their normal MO by sleeping all day and then coming down to bath at night.