It’s at the top left near the light. Originally, it was from a light being too hot, so it melted a small hole into the foam. That’s why I was worried at first. But I scooted things over and he can’t get any closer to the lamp by going through the opening than he can any other time.
I figure if he feels the the need to hide back there, I should just let him. I can’t see any way that he can harm himself by doing it, so I’ll just let him be for now. Maybe he’s just being a teenager. He’s due for a cage upgrade anyway. For now, I’ll just let him shun my love😂