Yes your cage is way too big, I wouldn't use anything larger than a 20 gallon long for a BP that small.

What are you using to measure temperatures/humidity with?

If the tank is too cold a BP won't be able to digest properly.

Is the Infrared heat lamp the only heat source? Is it on 24/7?

This picture shows the perfect size hide... They like them tight.



This is what I consider to be the perfect BP set up: