Doctor Answers (7) on Teeth cleaning
In addition, high doses of antibiotics, climatic conditions, infection and improper metabolism can contribute to discoloring of teeth.
Mix a small pinch of baking soda to your tooth paste and brush with the mixture, rinse with warm water, daily. Or rubbing your teeth with orange or banana peal once a day also helps. Eating strawberry can also whiten your teeth. Avoid the things causing discoloration as said above.
If not releaved teeth bleaching can be done, please consult a dentist.