You do realize that the smell of old cigarette smoke cannot hurt you in any way, right?
Which is something I have to try to explain every year when we have the Baptist convention people stay at the hotel, and they reserve the suites for their "Bishops" (Bishop IS NOT a Baptist title, and every Baptist "Bishop" is self appointed). Of course the suites ALWAYS smell like smoke, and they always act like they are going to get lung cancer or something from it. (Meanwhile I always catch their kids around back smoking pot).
Anyway, I never even could smell smoke anyway, couldn't smell it before I started smoking, couldn't smell it after, wasn't able to smell it the periods that I quit for a few months, and can't smell it now.