Brushing only covers 25% of your mouth, germs left behind may cause plaque and gum problems Listerine reaches all parts of your mouth and removes 99.9% germs Unique formula with 4 Essential Oils deeply penetrates to remove the bacteria in the plaque biofilm Listerine helps reduce gum problems in 2 weeks For best results, rinse with undiluted 20ml twice a day for 30 seconds. Don't rinse mouth with water or eat and drink anything for 30 minutes post rinse