Product review (5 stars): Like most others
Like most others, I was running multiple cycles on my dryer and clothes were still damp. I contacted several companies about cleaning my exhaust vent, and all wanted $129 or higher. I watched a couple of You Time videos about what they do and found this product. There was absolutely no reason why I couldn't do the exact same thing these companies were doing for a lot less money! So I found this product and spen't $17 on Prime to get it in two days.

Holy moly, did this thing work!!! Within the first few feet, I was getting a ton of lint falling out the vent.

Using the product is very simple, you just screw the additional lengths on to the others while they are up inside the vent. It tells you right on the package to only go in the clockwise direction, and then you move your power drill in and out to thoroughly clean the vent. The sections go on very securely, and there is absolutely NO REASON to tape the sections together unless you are an idiot that can't read the instructions. Do NOT use the drill in the counter-clockwise direction, or the sections will unscrew themselves. It's not rocket science.

I have a roof vent and the 12 feet of extensions were more than enough to reach from my laundry room all the way up. After I finished running the brush the full length of the duct twice, I took my electric leaf blower and blew out any remnants. I know it worked because before using it, I noticed a small pile of lint on the roof by the vent, and it subsequently blew away.

And just that quickly... The dryer is drying the clothes on one cycle only!

Save yourself a lot of money, and use this tool once or twice a year!