Did you know? Brushing only covers 25% of your mouth. Germs left behind in your mouth may cause bad breath, plaque, and gum problems. Listerine Mouthwash reaches all parts of your mouth to remove 99.9% germs and reduce gum problems in 2 weeks. Our unique formula with 4 Essential Oils (Menthol, Thymol, Eucalyptol, Oil of Wintergreen) deeply penetrates to remove the bacteria in the plaque biofilm. For best results, rinse with undiluted 20ml twice a day for 30 seconds. Don’t worry if you can?t get to 30 seconds the first time, it gets easier with each try.