Product review (4 stars): Cleared bird nest, prevented fire!
Several sparrows thought it would be fun to turn my dryer vent into a nice warm place to hide out from elements.  Normally, I am not one to mess with nesting birds.  This was the exception as it put my family at risk of losing our house to a fire every time we wanted to dry our clean clothes!  This handy tool was easy to hook up to my drill.  After removing the initial nest and whatever else I could take out by hand, I started to push the LintEater into the duct from outside.  I was blown away at how much additional nesting material (twigs, twine, etc.) was jammed back in there.  Much of the material was removed after just three passes.  I went inside to turn on the dryer and watched out the window as the remaining material blew out of the open vent hole outside.  I went outside and compared the airflow to what it had been prior to cleaning it out and was amazed.  After cleaning up, I replaced the dryer vent with a new cap that has smaller openings to prevent any more birds from getting any ideas!
Get this tool now to save yourself headaches later.  Even if you don't have any obvious nesting signs right now, give it a shot and see what comes out.  I think you will be shocked!