Sir Stains will again come after cleaning and polishing because u are a smoker. So my suggestion quit smoking and then go for cleaning, bleaching, polishing.

Hello sir, it's mandatory to quit your smoking habit... Because after doing cleaning and polishing, if you smoke again then the stains will become more worse... First control and quit your smoking habit and then do scaling, polishing and teeth whitening and maintain your oral hygiene...

Get scaling of your teeth done. That will remove superficial stains. After that you can opt for bleaching to whiten your teeth which will give good results

You haven't mentioned about how many cigarettes you smoke? Chain smoking is a serious issue, The visible and first signs are staining of teeth. Slowly the nicotine present in tobacco starts damaging the oral mucosa, nasal mucosa and respiratory tissues. In simple terms all the lining tissues that gets in contact with the path transpired by the inhalation and exhalation of cigarette smoke are effected. Cigarette smoking usually causes irreversible damage to the healthy tissues. Tobacco is the main etiological factor in oral cancer and lung cancer.

First of all please quit smoking because smoking only causes stains on your teeth ,however, you have no idea what harmful effects it causes to your oral mucosa or the tissue inside your mouth, which is obviously not visible to you initially.

U just have to go for scaling and polishing all ur smoking stains will be removed

Yes. Get your teeth cleaned from dentist and not once but do brush twice a day.  Also quit smoking. Take care.