There are a couple things you can do to approach the situation
1. As @Mike-And-Jane0 said, leaving an host review is crucial.
2. You can look into making extra signage that reiterates the no smoking rule. I list that my property is strictly nonsmoking, however people often do not read the Airbnb ads in full even though they are agreeing to the rules when booking. Because I have had rules overlooked (minor or otherwise) I have a welcome binder in the room in which I place another sheet with home rules. You can also mention it in your welcome message if you feel it is important enough to mention again.
3. If the smell is so significant that you believe it requires additional cleaning, you can open a claim and request funds from the guest. This will require you to provide supporting evidence of the extra cleaning/expenses. For example, I had a guest smoke weed in my home, resulting in a smell I could not get rid of. I ended up having to have the drapes and carpet cleaned, so I uploaded the estimates to support my claim. Now obviously the guest does not have to consent to paying the extra funds and can decline or ignore the request. In that case aircover would come in, evaluate and decided a compensation amount if any.
