After you finish brushing your teeth, swishing around some water before spitting ensures that you rid your mouth of all that frothy toothpaste. “It greatly helps oral health by strengthening the tooth enamel, making it more resistant to tooth decay. The Oral Health Foundation even launched a campaign called “Spit, Don’t Rinse” in 2016 to encourage the habit. The need to completely clear your mouth after brushing can be strong, especially if you’ve rinsed with water for your entire life. Skipping the post-brush water rinse is just one way to improve oral health.