Had a similar problem in an apartment in Dallas.
One question, what are your floors made of?? Is it poured concrete or wood construction??
If it's wood, go downstairs, or better yet get their phone# and tell them that you are going to start cleaning your "Shotgun" and the last time you did, it went off and blew a hell'uva hole in the floor!!! Also, say that every time you smell smoke, you're going to clean it again because the smell of Hoppe's Solvent is all that will get rid of the smell!!
Later
Martin