One of my gray tree frogs escaped earlier this week. I still have NO CLUE. I woke up to find her sitting on top of the screen staring at me when I went to check on them. She was a bit dry and very happy to go back in her viv. I had some leftover screen material from my viv build, so i put that over the top and wrapped it with packing tape. It has kept her in now, but it sure is a pita! Next week I can move her to the new viv though and that one should be totally escape proof!