MarketplaceMouthwash ExperimentPosted on April 8, 2010. Does anyone have a good experience to know what brand of mouthwash kills the most germs? I need a good project for my science fair! =] Listerine is an antiseptic and kills germs that cause plaque, gingivitis + bad breath. Mouthwash refreshes your breath and it just all. diint brush your teeth and use of certain types of mouthwash. those who stop teeth falling kill most germs =] diint brush your teeth and use of certain types of mouthwash. those who stop teeth falling kill most germs =] In our microbiology class, we used petri dishes of bacteria and took a little round holes soaked brand of mouthwash and some have been placed in the center. The brand, which was the most effective has more bacteria consumed around her. CommentsThere are no comments.Leave a Comment | Popular My Friends |