I have such yellow teeth and nothing ever works. I have got bleach from the dentist but that was a pain in the butt and it didnt seem to help much. I have tried lemon juice and baking soda... I have tried charcoal which seems to work but then my teeth look yellow again an hour later. I have tried some drugstore whitening tooth pastes but not very name because my teeth are very sensitive so I have to use sensitive teeth tooth paste. I am so tired of yellow teeth, I rarely show my smile because of it! I don't drink coffee or achohol so they can't be stained from that either. Help, I'm willing to try anything! Thanks a bunch ladies😘