Thanks, John. I've got socks plugging up the holes in the back and just one of the slide vents barely open. That being said, I think they're still getting enough fresh air because I'm not experiencing any quitters to speak of. I've also added one wick to the tray and just replaced it yesterday because it was smelling moldy. Just hate to use the wicks because they're so expensive. I'll leave the fan alone though. Thanks again.