Product review (5 stars): Negligence not use this product once or twice a year.
No one should operate a dryer in their home without using this kit at least once a year. I (embarrassed to say) removed 10 years of lint from my vent and it was disgusting. My vent is approximately 40 feet in length and so I had to purchase a 12 foot extension kit and work from both end to clean my system. This first time I used a ShopVac to blow air from inside my home to the outside. But now that I'm confident in the performance of the LintEater, I'm going to use the dryer exhaust for air flow and work with the LintEater from the outside, while the dryer is running.

I then purchased a 45 foot USB video camera:&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/ZHOL-45ft-USB-Cable-Waterproof-Drain-Pipe-Pipeline-Plumb-Inspection-Snake-LED-Video-Color-Camera-15m/dp/B004ADETZ0/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">ZHOL 45ft USB Cable Waterproof Drain Pipe Pipeline Plumb Inspection Snake LED Video Color Camera (15m)</a>&nbsp;to inspect the vent and found that 95% of the lint was removed on my first attempt, which was to be expected because I could only get the LintEater to go 20 - 22 feet in from either direction, so I'm going to purchase a second 12 foot extension kit, which will allow me to almost clean the entire line from one end.

Note, because the USB video camera is a very flexible cable, I had to tape the camera to the LintEater extension rods to get the camera to go all the way into my vent, and I also used a flattened tennis ball to keep the camera lens in the central portion of the vent and not just to one side. Without the video inspection, I would never have known that the LintEater was doing an effective job. And I'm very happy to report on it 5-Star performance.

Final note, the captured lint is highly flammable and has useful applications is starting campfires, so if you're the outdoor type, you might just want to save some.