Product review (5 stars): This is a Marvelous Tool
Its rare that I find a tool that works so exceptionally well that I think everyone should have one. In this instance this is one of them. Thirty years ago we purchased one of the accordion aluminum flexible dryer hoses but ashamedly never cleaned it. A month ago I inspected one end of it and was flabbergasted to find it had almost grown a new skin of lint on the inside. I purchased this Deflecto Duct Cleaning kit and tried it out today. Within less than 10 minutes all the lint was removed. The only caution I advise is if attaching it to a drill is to only run the drill clockwise. If you reverse the drill while the brush is inside the extensions will come undone and the brush will be sitting somewhere within the flexible duct. You'll need to push it out one way or the other with something long, and you could accidentally puncture the duct while doing that. Worth every penny.