I just got my first frog, He's the cutest White's tree frog ever. I got him yesterday and I had to take his hidey holes out because he was getting too wet and turning brown. he's going green again but I'm worried to put the hidy holes in until the cage is a bit dryer. He's started what looks like a leopard gecko glass surfing, but I've never heard of a frog glass surfing.

I'd like some advice please! is glass surfing normal and when should I put the hidey holes back and how brown is too brown?