Odor problems need advice

yo guys, I think I have a smell related problem here.

So here's the story.

A man came to by door today to try and sell me some magazines. I'm sure you all know the same story they give where they are trying to earn points for something.
Well he made a statement that made me jump a little. He said that my home sure smelled good, really good in fact.

He then discretely asked if he could buy some smoke from me.

Too make a long story short, I turned him down on both the smoke and the magazines.

My fear is that my odor control is not enough. I have a 4 inch fan with carbon filter working day and night in my grow room.
What else can I do to get the last little bit of smell out of my home so that people visiting my door step don't get hit in the face with that really good smell?

bump bump bump

6" fan and 600cfm carbon filter. Hate to say it, but I tried all kinds of shit, and in the end... an expensive a hell filter ($200?) and a tad noisy $100 fan. My location and situation cant afford ANY smell to leave my home. Had the in-laws in and even as non-smokers, never noticed during a harvest dry. That, and my home actually smells cleaner. Remember, even tho it may SEEM you have enough cfm's, do you? When you have fans blowing inside a room, it takes a tad more exhaust to maintain a good vacuum i think. Just think of it this way, "How much are court costs in your county?" And with that, Im sure youll handle the issue properly

Best of grows to ya