I would like to clarify that I have a hamster cage with the bars. my cage

I’ve had two female mice in this same cage before and never had any problems with them being able to get out. One of them recently passed and to make sure the remaining mouse wasn’t lonely, I got two more.

One of the new mice has gotten out of the cage 3 times today. She’s been home for about a month already and I haven’t had a problem before. I did just clean and change the bedding and I’m worried that maybe I put the top back on wrong, but after looking at it I don’t see a place where she would be able to get out.

I will say I unlatched one of the parts that keeps the top down and she hasn’t been able to get out again. It looked like maybe the latch was stretching the bar down making a wider opening.

Still very worried she’s found a way out. Anyone with similar cages, has this happened to you? How did you fix it?

Edit- I’ve added a link to a pic of my mouse cage

Just got home from the store and she was crawling on top on the cage and around the backside of it. What do I do????