Important Tips: 1. Go back and forth in a tiny area for a few passes with little or no pressing it 2. Try it at first on low setting, so you could get used to the sensation. Then slowly increase the intensity to find the best level for you. Please note: 1. It wont be the replacement of all you dental cleaning, but it helps you stay clean in between the visits. 2. It doesnt eliminate the need for flossing as it serves a different purpose