Why would flies and bugs be in your snake room anyways. the holes are a great way to adjust your humidity. of the 2 vision racks I own (hatchling and cb-35) I've never had a escapee now thats not to say it can't happen, but if ou follow instructions then the tubs become quite tight. So in point I love mine and will continue to use them.
Crickets mostly Revert to my screen name if you wonder why those are in my reptile room.
- Matt
Come here little guy. You're awfully cute and fluffy but unfortunately for you, you're made of meat