Hi !

I recently built a new (gigantic, 170 gallons more or less) tank for my girl and i'm a bit concerned about the husbandry.
The temps are not yet in the required range: 75F ambient temp, basking spot with a heat mat at 86-90F (depending on the hours of the day)
I have ordered a ceramic heat lamp of 250W to help raise the ambient temperature so I think that will get better.
My main concern is the humidity. It doesn't get passed the 50%. When recently in shed I sprayed water a few times a day to avoid issues with her shed but she still shed in a lot of pieces and I ended up soaking her and helping her out with a damp cloth. Anyways, that turned out fine.
I put also a sort of fountain/cascade thinking it would raise the humidity but it just helps it keep it around 49%. Doesn't get lower anymore.
My snake has a humid hide and a water bowl but still, with the new ceramic lamp arriving, I'm afraid the humidity will go down.
I thought of buying a mister to cope with the humidity issues. Or do you think it's not necessary and she will be just fine?

Thanks for the help!