I'd like to see the research and proof that a snake has died from drinking it. I am not doubting it but what I am doubting is that you have any real proof as it's probably just hearsay. If you do, I'd love to see it as this discussion was taking place on another forum and I'd like to add any page you can find that details a case of death from drinking NIX.
Most people agree that apparently only a couple snakes have died from NIX and that was using almost FULL strength. I have never ever heard of another case of death.
I bath mine IN NIX. It's simple to avoid them drinking it. You first give them a fast normal bath. If they drink great, if not fine too. Then you just WATCH while they are in the NIX bath. It's really very simple. Mark said it far better than I have.