should you rinse after mouthwash
1 Don't rinse with water immediately after using mouthwash. 2  The cleansing properties of mouthwash continue to work after you have spit it out, and rinsing with water will dilute the wash and minimize these effects. 3  Some mouthwashes with extreme mints can dry your mouth, so limit the use of it.our bottle of mouthwash may have come with a small cup (often the bottle's cap) you can use to measure the correct amount. If your bottle didn't come with a cup, pour the mouthwash into a small cup you've set aside for this specific purpose. Some fluoride mouthwashes only require 10 ml.