I use Ultrasonic humidifier in the room where the chams reside to raise up the whole room humidity. That + misting bring uo the humidity to acceptable level.
I used this only because during fall and winter where the humidity level in my room can drop all the way to LO reading in my hygrometer (below 5%) -even with the plants that I have in the cage.
I guess raising the misting time and adding more misting sessions can fixed the problem altogether without the needs of humidifier.
Honestly, it's not an absolute must. It just nice to have. It's a luxury, imho.
I used vicks 5100N.
Some people have bad lucks with it... and some don't.
I am the latter case.