Product review (5 stars): Works Great!
Great product! Works just as directed but be sure to read the instructions. I didn't see that while using it, the product must only be turned clockwise. Well, I went clockwise in, then taking it out I went counter clockwise. In the process, the head fell off. It took a lot of work to get the head recovered since my duct runs almost 20 feet. So word to the wise, be sure to only use it clockwise! (I also super glued it on to one of the  sticks to help prevent it from happening again)