Hello
As u mentioned.....becaz of regular smoking...layer of tobacco starts getting settled on teeth n around it ....gradually it gets hard n may get absorbed on teeth surface at times
Tooth paste may help only after treatment of cleaning n polishing
Next Steps
pls take an appointment of dentist n get rid of stains n calculus...
Health Tips
after treatment
brushing twice z compulsory
put a habbit of rinsing everytime u eat
pls try to get rid of smoking as it may cause severe diseases