CinnaSlim
Queen of Swords
You're not supposed to use tap water. You can use distilled or boiled water (3-5 mins).Those are actually pretty dangerous if not used correctly. I've been advised against it over and over by ENT's.
http://www.medicaldaily.com/3-common-neti-pot-dangers-and-how-avoid-them-258177
It's just like when people use contacts incorrectly. You have to be clean and responsible with anything you put in your body and do your research.