Product review (5 stars): The products works great! Had 15 years of buildup
Wow. The products works great! Had 15 years of buildup. It took three drill batteries and a good vacuum but we got out about 10 gallons of lint. Could not believe it. I will say, don't try to push it through all at once. Clean  back and forth on about 2-3 foot sections and pull all the way back out. Also, we went from both ends because of the turns and length etc. Remember, lint is thicker than you think. Clogged a good shop vac multiple times. Take your time. Rods are very flexible. We had two 90 degree turns and had little trouble. Photo is from the first 6 feet of cleaning.