Ceres asked:

i take good care of my teeth. i brush twice sometimes tree times a day for about 5 minutes each time i floss and i use Listerine. My teeth are still yellow and i have been doing this for 3 years. Why are they so yellow? I don’t drink tea or coffee or soda. Does anyone have any ideas on how to whiten them without going to a dentist? preferably something that you have tried and seen results.