I bought an "oust fan" since the sent was fairly innocent and it claimed to get ride of odors, not just cover them up. this was several months ago and I quite liked how it worked with my house and my own smell sensiblities. The oil in it has run out, but apparently it's been discontinued. Now you can still order some of the last refills on line, but I can't remember which of the scents I had. I know I didn't like most of the other ones. But since it's the internet and we have no smell-i-net, I can't figure out if it was "clean sent" or "outdoor scent." The refills are about $4 and only avilable from places that charge shipping. I've looked for markings on the bottle I have, but all it has is a number that doesn't seem to correspond with any part number. I'm betting it was a batch number or something.