Similar to my BP, he likes to stay in his cold side hide. Even though temps/humidity/husbandry are properly met. Cutting down the Folgers container into a proper size shouldn't be a problem. He probably still has his scent in that folgers container so I'm sure if you reintroduce to him. He will utilize that hide again. Give him some more alone time in his new enclosure. He'll eventually settle in and get comfy.