You do not have to repeat your wudoo’ after smoking, but you should remove the offensive odour from your mouth with something that will take it away and repent to Allah from such a sin.

https://www.youtube.com/watch?v=wiQyi4Yyb5Q

I smoke .. I know its wrong; my question is I do wazu and pray then after some time i smoke then its again time for prayer , do i have to perform wazu(ablution) again whenever i smoke ?