I'm trying to understand why some of you guys go out and purchase crappy (or good) alcohol to put in your air locks? I've always just filled the airlock with my sanitizer (iodaphor and water) that was in the carboy right before it was filled (it gets dumped into my 6 gal ale pail before being filled, so even easier access to it). I have (knock on wood) not had a single problem with this in 10+ years. I guess I'm trying to figure out why you would spend money on something else, when you'd most likely already have the sanitizer on hand during a normal brew day.