Gold stars for Obill, Jer, and Kristie!!!
Does anybody else qualify?
Kristie, I chain smoked for a good two years after my husband quit. I tried not to do it around him but did smoke when on the computer so it was in the house. I am ashamed of that now, but as you and everybody else knows, nobody quits until that day they wake up and choose not to do it anymore. If threats of going to hell, loss of income, child abuse, failing health and/or death aren't sufficient to make people quit, it is unlikely nagging will do it.
My advice is to back off and do what we women do so well. So very subtely wrinkle your nose to express displeasure at the smoke smell....but don't use a disdainful expression - it should be pained and long suffering. Look concerned when appropriate. Suggest lots of nonsmoking activities--restaurants, movies, playing cards at non-smoking friends' houses, etc.
If you do this well, it could hasten that day he figures it's easier to be a non smoker than a smoker. Don't overdo it though or he'll catch on and interpret it as nagging.