You need to be careful with your attempts to raise humidity. One of the common problems of raising humidity with misting is the substrate stays too wet.
Wet substrate can lead to scale rot.
Also, I was just talking with my vet about this the other day, when there is substantial humidity; bacteria can grow in any excess moisture(like condensation on the tank sides). This can lead to an RI .
So if you have mold growing, which will happen in times of high humidity and excess moisture you definitely have bacteria growing in your tank.
I disinfect with Virosan.
You need to give more details on your tank setup, what substrate is dirt style???
What are your actual humidity levels?
I personally don’t keep humidity too high except during shed. I use about 55% normally, and bump it up to about 80% at first sign of shed, and keep it there through the shed cycle. All of the snakes have perfect sheds and are in good health at these levels.
Good luck,
TomChambers