duct cleaning

Sometimes you have to go at something backwards or inside out or sideways. Sometimes you've got to invert the normal thinking. Sometimes you have to invert it once and then invert it again to get something completely different, as Frank N. Furter did in the Rocky Horror Picture Show:I'll remove the causebut not the symptom.In the case of getting your air conditioner's ducts cleaned, though, we're dealing with a single step of inverted logic. I'll get to that in a minute, so stick with me here.