for the hundred+ that you would spend on that, I, personally, would go to rich at reptilebasics.com and get a proper snake enclosure. http://www.reptilebasics.com/2x2-cages/ . I had glass tanks and still have some for my geckos, they are a pain and most people move on from them as they aren't really suitable for most snakes. You can cover the top with tinfoil and duct tape (depending on the type of screen) but even that won't do a whole lot that I noticed.

Also, bump her up to small mice. Hatchling balls can take hopper mice (larger than fuzzies). Her meal should leave a small but noticeable lump in her belly.

Good luck.