Looks like your humidity is low. What is it measuring at? And how are you measuring it? It should bounce back with a little misting, but you should try and keep his humidity at 50% all the time. And wouldn't hurt to bump it up during his shed cycle.
Its around 60% and he has a humid hide, waterbowl have on a heat mat to evaporate and a waterbowl a diving team would be proud of