Dryer Duct Cleaning

After having the appliance repairman out 2 different times to work on the dryer and $300 later, my sister soon discovered that the problem was low airflow from the dryer vent preventing the clothes from drying. Our personal "handymen" spent all morning Saturday tracing over 30+ feet of ductwork from the dryer vent to the outside of the house. There are 3 seperate 90 degree turns up a wall, across the ceiling, and down another wall before reaching the outside wall 12 feet from the ground. Along this path is where the previous homeowner stockpiled years worth of lint and other unidentified items which caused the problem. So now that the problem has been discovered, how do you think the handymen tacked the job? Well, the preferred method involved a ping-pong ball taped to 40 feet of twine, a few pennies added for weight, two different sizes of electrician's fish tape, a ladder with volunteers taking turns holding the bottom for stability, and a leaf blower. I have included demonstration video.  If you decide to use this method, please proceed at your own risk.