I use super-worms for one of the leopard geckos which eats nothing but super-worms. Here's the problem. Super-worms turn their substrate into a messy, sloppy mess if it is not replaced. However, by the time it turns moist, fly's just start coming in and laying their maggots. The maggots later crawl into the super-worms and turn them into a spasm like state, which kills them of course. Yesterday, I got frustrated enough to have the entire herp room vacuumed and then mopped with antiseptics, which I thought would keep the flies out. Unfortunately not. So they came back and I have no idea what to do. What's the root cause and what are your suggestions?