The FO is going down the drain for the most part, but some gets dispersed into the air (that is what you are smelling). It's not the stuff in the air that I worry about. Putting FO down the drain is not very environmentally friendly to septic systems. It's not a huge amount, and you wouldn't do it very often, so I don't really think it would be all that bad though. However, saying that this product is "environmentally friendly" is not really true IMO. That is the only point I am trying to make. Don't get me wrong, I like your product and the packaging with the scoop is very nice. I just don't think the phrase "environmentally friendly" is applicable.