Product review (5 stars): Lint Eater Clears Concrete Slab Dryer Vent...
This little gadget saved us from creating a new dryer vent!
Recently purchased a house that has the dryer vent running thru the garage concrete slab.
It's about 22ft of PVC tubing that ends in a elbow joint outside the house.
The tube was clogged and not working.
Thanks to the Lint Eater and my electric leaf blower its all clear!

Pro Tip: use the Lint Eater to loosen the gunk. Then blast it out with the leaf blower.