Not sure what's the actual name of it but it's a little black device with blue buttons (Mode and Scan) that measures temps. All I know about it is that it's from Zoo Med and it's digital.
I'll use the Spanish moss. I have more of it anyway and it can also help with raising and maintaining humidity.
I'll move around the substrate to increase/decrease the temperature in certain spots. (Add some in his hide to decrease the temps) he's never around the left side anyway, only the middle and right. Currently all he's doing is hiding and sticking his head out to drink water. He's been drinking a lot lately, which I'd imagine is good, isn't it?