Humid Hide (Scale Rot?)

[Patricia]

Since we use a heat lamp to bring up the temps on the cool side and it's on more now that winter's approaching, the humidity has dropped to 38-45. (Even with having a wet paper towel on top of each hide and covering most of the top with a towel.) I'd like to create a humid hide.

First, how do I do that? From what I read, do I just put wet sphagnum moss inside a hide?

Second, I've also read that a damp substrate can cause scale rot. But isn't damp substrate exactly what we're creating in a humid hide?

I must be misunderstanding something and sure would appreciate some guidance.