Normal eating and drinking can expose your teeth to sugar acids throughout the day that can leave your teeth vulnerable to cavities - especially overnight. LISTERINE® Nightly Reset is a formula that works while you sleep to fight the effects of the day. How LISTERINE® Nightly Reset can help fight the effects of the day: Remineralizes enamel: - It remineralizes enamel to strengthen teeth thanks to its high level of fluoride Cleans Deeply: - It cleans deeply by reaching where brushing can\'t: - Reducing plaque build-up - Reducing germ accumulation - Reducing acid production - caused by food and drinks - that weakens your teeth It helps prevent cavities. Use before and after sleep as part of a regular routine.