That's weird, ours chills in the corner too! I set up the housing in an extra 20 long we had.
I set it up with aspen, hot hide, cool hide, a random tunnel hide in the middle, water dish, and a humid hide. She chills usually in the cool side in the corner. But does go in the hot hide after eating a lot of the time.
I use a red bulb to keep the ambient temps up, but this is Alaska so its starting to get colllddd.
She keeps having bed sheds since they were horrible at the store, so I tinfoiled the top of her tank, and always keep the paper towels in the humid hide moist so hopefully the next time she sheds it will go well.