Personally I think you are out of your mind if you continue to grow in that situation. If I were in that situation, the plants would be gone the next day by either moving them or cutting them down. If you are foolish enough to continue you need to get a large carbon filter, install it and then stick your nose directly in front of the vent at least 6-8 times a day (plants will smell more or less throughout the day so you need to monitor, also check after you water or if you spay water) to make sure there is NO smell whatsoever. If there is ANY smell at all after that you will need to buy an inline ozone generator (like Big Blue) and add that in addition to your carbon filter. A 1/2" carbon screen isnt going to make zero smell, dryer sheets arent going to make zero smell, they will help but they arent going to get you zero smell, which is what you need now that someone KNOWS you are growing. I am a legal medical grower and would be extremely pissed if I could smell anything outside the grow, I would spare no expense whatsoever, even though what I am doing is legal (at a state level) its insane to broadcast what you are doing to the general public. My advice is to move it or cut it. If you are going to try to fix it, you cant 1/2 ass it at this point(which is what dryer sheets or small carbon prefilters are). In the future, dont grow without proper odor control, you got extremely lucky.