Mine stayed hidden for two months straight when I first got him - not even moving to thermoregulate that I could see... Now though, he's rarely in the hide. He sits coiled up behind it or next to it, but not usually in it. It's the weirdest thing to me too. Though, not any weirder than what the larger one does. She sticks her tail in the cool side hide, and her head in the warm side, and stretches her body across the middle of the tub. Explain THAT ONE to me...