I've had carniverous plants for three years now, and I've never had this problem. The water in the bottom of some of the trays has developed a thin, milky film that I assume is bacterial. The first thing I did, of course, is clear out the water and wash the bottom of the pot and the tray with soap and water. But this did nothing; the film was back in a day or two. The next thing I did, which I have done several times now, is to put a little hydrogen peroxide into the tray with the water. This works great for about two or three days. But when the bubbles stop, the film comes right back. Does anybody else have this problem? It's not even happening with all of my carniverous plants, just my venus flytrap and my cape sundew babies.