Actually Listerine does have a documented very high kill rate. Of course it's 25% alcohol, so that is no surprise. Rinse your mouth with very dilluted bleach and you will have the same out come with apparently little damage to your tissues (I"m not recommending it, but a doc at UCLA has recommended a limited use of it in patients with rampant perio disease to get things under control immediately. But with both ideas, besides killing the bad bacteria and flora, it also kills all the beneficial bacteria and flora that keep things in balance in your mouth. It's a scorched earth (using alcohol) policy, and in most things that isn't a great approach.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.