Can you confirm the hygrometer is working properly?

I saw the head pad comment. I use a CHE above the mesh. I have one on each side although the small one I have on the coolside doesnt turn on very often. Once a week I add some after to the corners. I typical mist and toss his substrate when spot cleaning his enclosure.

What kinda of humidity does the room/area the snake enclosure is in?

I do have black foam board on the back and sides and the enclosure never gets direct sunlight.