Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain the stains caused on teeth due to tobacco chewing habit are tightly attached to the teeth and they do not get removed by brushing.. They need manual cleaning by using a vibrating machine known as Scaler that is available at dentist s office.. You need to consult a dentist and get evaluated and for tobacco induced stains Professional cleaning of teeth known as Scaling following by Polishing is the treatment of choice for cleaning your teeth.. The stains can also relapse if you continue to chew tobacco so the best way to get a permanent solution is to completely withdraw chewing tobacco and get Scaling done.. If still some discoloration is left on teeth Bleaching of teeth either by In office or home bleach techniques using Benzoyl Peroxide can help.. You should also ask the dentist to demonstrate you a proper brushing technique that you can follow daily while brushing your teeth and will help in maintaining a better hygiene.. Hope this information helps.. Thanks and regards.. Dr.Honey Nandwani Arora..