I keep a moist hide in the tank all the time - its a terra cotta pot (upside down) with moss in it. I soak it in boiling/near boiling water about every 10 or so; or after it gets poo'd in to prevent mildew. I reuse the moss until its soiled / starts to smell old which usually takes about 2-3 weeks.

My boy really only uses right before he goes into blue. But soaking the pot in hot water every 3ish days keeps the humidity 55-65% without needing to mist. I also have a little dish of moss on the opposite side of the cage that is always moist to help maintain ambient humidity. I have a T11, so it's a big cage - and only having a water bowl wasn't enough (mostly in the winter though)