I have clearly known people who didn’t know they stank and places where people who lived there clearly didn’t know that their places stank.
I’ve been around smokers and smokey places since I last smoked, and I don’t find it offensive. But I know some people find old smoke sickening.
In my case, it is twelve and half days since I smoked anything. I’m pretty sure that I’ve cleaned up pretty well, but I’m not so sure that my car or apartment are a lot less stinky. Unabashedly, I take delight in having the windows open a great deal these last several days, and I have definitely done some nonusual cleaning that makes me happy!
And, although I’m coughing a great deal less and haven’t gagged on post nasal drip in a week, I still cough up the occasional luger, which is pretty disgusting in itself.