Try talking to them with a joint in your mouth one day.
If you do want to confront them, let them know you smoke (discretely, over time), they might want to sell you some pot (if they do, say something like "I got enough").
Then another time, hint that you can smell weed, not the grow, just weed. Later say you think they might need a scrubber.
Personally, I think you should just leave'em alone, but if you insist or think that it might cause problems for you. Let them know over time, be "neighborly", and once you earn each others trust let them know they need to deal with the smell.
If you do want to confront them, let them know you smoke (discretely, over time), they might want to sell you some pot (if they do, say something like "I got enough").
Then another time, hint that you can smell weed, not the grow, just weed. Later say you think they might need a scrubber.
Personally, I think you should just leave'em alone, but if you insist or think that it might cause problems for you. Let them know over time, be "neighborly", and once you earn each others trust let them know they need to deal with the smell.