Did you know? Brushing cleans only 25% of your mouth. Germs left behind in your mouth may cause bad breath, plaque and gum problems. LISTERINE® Cool Mint® 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, Eucalpytol, Oil of Wintergreen) deeply penetrates to remove the bacteria in the plaque biofilm.