I have heard a lot of conflicting things about care of venus flytraps.
I have a little one I bought from Home Depot. It had a long stalk and I allowed it to flower, but only two buds bloomed and it started turning black and fuzzy, so i cut it off at the base. (one website says not to let it flower; it uses up too much energy and is not very spectacular anyway)
then i saw a little bug flying around (a gnat or fruit fly sized buggie), so i herded it into the plant. it walked right through all of the traps without setting them off, i touched the little trigger hairs a lot and they didn't budge. i finally forced it into the best looking one and blew on it so it would wiggle. the trap only closed after lots of wiggles. it closed up tight and after a day had the look of a bag with all the air sucked out. then about three days later the trap was open again and some kind of orange something was all over the trap, like droplets on each of the tooth-like things, and some lines of orange across the outside. it didn't smell good. I cut off that leaf and two others that looked like they were going bad.
anyway, it has some new traps growing and i want it to live without anymore rotting problems. I assume it was having trouble because it was inside an airtight clear plastic dome. i DID open it every day and circulate the air, but the latest thing i read said not to keep it in an airtight space, even though other sites said i should. right now it is in the little pot it came in, in a dish and the dish has distilled water sitting in it, with the pot sitting in the water. were the rot problems from lack of circulating air, or too much water? how wet should the peat be? the instructions that came with it say it should be sitting in water, and so do several sites online. i am near the northeast coast of the US. i don't know if it is humid enough here.