Help! Venus Fly Traps?!?

I've had two in my live and I always end up killing them. Bottled water will be okay and don't over feed them, maybe two flys per week. I never had peat moss with mine, but it doesn't cost much. I think I bought my flytrap for like $6. It depends on how big they are and where you go. I've seen them sold at Homedepo and Lows, any place that sells plants might have them.