When I first got my snake, the humidity was absolutely terrible. It stayed around 40% at the best when I had aspen, but when I changed to cypress, it immediately bumped it up to around 70%, and I never had to spray down her cage.
However, it's been about a week now when the humidity is dropping, and I've begun to have to spray again. I'm never home all the time so I can't monitor her much besides on the weekdays! Not to mention, this morning I woke up and her humidity was at 50%, the lowest it's been in a while. I don't understand why it's being like this, do I just need to take the old out and put in some more?

(It doesn't help every time I spray, the next day it's dried right back up because of my lamps and the screen top, despite the fact I use syran wrapping on one end to help)