Product review (5 stars): a product that works
My dryer vents out my roof, two story house with second floor laundry room. I followed the instructions and i got almost a 1/2 full plastic bag full of lint out of my ductwork. I ran the brush from the inside of the house and it worked fine, instructions show product being used from the outside vent. My wife has one of those high speed dryers and it cut her normal drying of a load by 15 -20 mins that is going to save me money and prevent me from having my house burn down. I will clean my dryer duct every other month now to be on the save side.