If it is a baby, that is totally normal. They seem to be hungry all the time, and think everything is food. Hiding a lot is totally normal too. I think if he's hiding all the time, that means your set up sounds good. The only time I see mine are at night, and getting close to feeding day. And, my little spider girl used to snap at me every time I opened her tub. With a little love, and handling he'll be fine.

Do you know how to recognize a shed cycle? That could be an issue to. Your hot side is a little warm. It should be more like 80-82. But, it shouldn't cause any problems.

Did you get him from a pet store? The only bp I bought from a pet store was pretty cranky too. They seem to stress out more being tapped at all day long, where as breeders keep them in quiet tubs.