You know, Dr. Phil said something that has stayed with me... "You always replace a habit with another habit."
Confession time: My replacement habit is CHEWING GUM. I mix Nicorette with a certain flavor of Trident gum. I haven't yet broken the chewing habit, but I know it's much better than sucking on cigs all the time. Different strokes for different folks! ;-)
Your hubby probably can't really smell the goop you clean off the walls, etc, yet. But once he's been "clean" for a couple of weeks, get some Windex and a paper towel - wipe off an area of glass that's been exposed to his smoke - and have him take a sniff. It's a real eye-opener.
Oh... And since I've warned you about asking him how he's doing/feeling, I need to add that he'll be needing a few "atta-boys" occasionally. And to hubby, just tell him to STAY BUSY such as taking walks, working on a project, etc. Also going to non smoking venues such as movies or a library is helpful.
Tell him I wish him all the best! And IF he fails, it ain't disaster... Just get back on his feet and try again!
Hubby says thank you for the encouragement and best wishes. I've told him that I'm so happy and proud of him for making the decision to quit. I know it will be difficult for him because he is outside most of the time, or driving sometimes for an hour or so at a time to and from locations, in his work. Like you said, he'll replace the cigarette habit with another habit like Commit Lozenges, and maybe chewing gum too, but it'll be better than cigarettes!
I know what you mean about the Windex test. Cigarette smoke never bothered me when I smoked, but it sure can make me sick to my stomach now.