Just bought my first bp today, a beautiful cinnabee! so far she's acting well, she's in her hide and went on exploring earlier but now shes in there again. But I have a problem with keeping the humidity up so far. It keeps lowering to 40% and I know I need at least 55-60%. I have an exo terra tank and I've tried covering most of the top with damp cloth, spraying the tank, putting water ball on warm side, and yeah the humidity goes up that moment but never stays up.

Should I be worried with 40%? I do not want to spray too much as I'll just make everything too wet and probably mold but I also dont want my new friend to die overnight from bad humidity conditions! (if that could happen).

The top is mostly mesh and I've done a bit of research and some people say cover it with plexiglass, that's kinda not an option for me right now sadly , But some people also proposed covering most of it with tinfoil , would this work ? is it even worth a try? some even say tight wrapping?

Other things I would like to try is putting in a moss ball in there but its already night time and pet stores will close or are probably closed, I dont have that option tonight.

Any emergency ideas please? Dont want my snake to die! thanks in advance.