My Chloe girl escaped. It appears the lid wasn't completely secure or she gained super strength. It's happened before but we were able to find here under the bed next to the tank. No such luck this time. We turned that whole animal room upside down looking for her. Even looked in adjacent rooms and in places that seemed impossible.

So I've read about a trick of putting flour at the baseboards and see if a trail shows up later.

If you've got other tricks let me know.