I’ve always used one as a child, but haven’t had one since I moved out a few years ago. Now I bought one for myself a few days back. Idk what it is exactly but it does really feel like I’m giving myself a deep clean instead of smearing around the stuff on my teeth. Of course that’s exaggerated, but if you’re a bit lazy like me you should try one. I got mine on sale for 20 bucks, so its not like its super expensive.