I have no teeth problem. The problem is about the color of my teeth. Though they are a lot better when compared with others, but I feel they're becoming yellow day by day. And my lower jaw front teeth borders are fixed with dark yellow dirt. I try to clean it by brushing a bit hard daily morning, but I couldn't succeed. Will teeth cleaning by a dentist help my problem? People say that, if we once attend a dentist for cleaning, then we must make a habit of attending for regular cleaning. Is that true? I'm a kind a man who prefer natural solutions. They make appreciable suggestions. Thank you.