He quit eating while in the 10 gallon, and there was always a good 1 1/2-2 inches of substrate and he never dug so if they are burns its not from inside the cage. My cousin doesnt have anything ATM to determine temp and hmidity i told him it could be an issue and to buy at least 2 thermos and a hydrometer. He never showed signs of runny stool and was gaining weight great but (unless he isnt telling me something) just stopped eating. And his set up as is has a water dish on cool side, bark hide under the light and 2 sticks to climb on with some kind of wood chips not cedar for sure though. And it probably has been closer to 2 months since he last ate.