Duct cleaning has taken off like wildfire over the past thirty years. The advertising for it is near ubiquitous. Customers far and wide are singing its praises. And duct cleaners are making a tidy profit. So everyone is happy, right? Perhaps not. Skeptics believe the multi-billion dollar duct cleaning industry to be a multi-billion dollar scam. Come with me and I'll show you why you might want to be a skeptic too. I've chosen Chicken Little as our travel companion because his story dovetails nicely with the story of duct cleaning.