My rack is located in a room down stairs in the basement. Not even a mouse can go under the door because I had new carpet put in and I have to give the door a good push to open. Less likely a bug of any sort can get in or out unless it can find it's way through carpet or get through window screens and such. It was only one earwig and I checked my other racks and nothing no more bugs. I just freaked out and I took a look at my BP but he's chilling lol he seems fine. Looked like the earwig was looking for an exit.