got a new water dragon

[MrPower]

i have my new baby chinese water dragon. like all my other reptiles, iv spent a week in research. seems to love its new home.
i called him/ her hydro, hense the name "water" dragon lol.
so i wondering if anyone have some usfull advice?
i love hearing from actual owners, just all around better than reading books and articles.

here is a quick review, i have my wd in a 4 foot high enclosure, i build myself. with a 20 gall tank as the base. the top enclosure part is made half and half with pexi glass in the front and back and mesh on tyhe sides for good ventalation.

substrate is a mixture of exo soil with coco husk on the top, it has a 6 by 12 plastic container pushed into it with water, and an air stone hooked up.

a load of fake plants, vines, branches ect.

a 100 watt heat bulb and a uvb coil bulb in a little conopy on top of the metal meshed hinged opening.

temps are around 88 in the upper part of tank, lower 90's just under lamp, and a bit cooler down bottom.

one of my main questions is, do these lizards actully need 80 percent humidity at all times, i cant seem to keep it above 70. with the heat, the plants dry off quickly, even with three or more good mistings a day. or are they like other humid needing lizards where you can soak the enclosure in the morning and does not matter if it drys during the day, and just mist it again in the evening. i cant find much info on the internet reguarding this