Whenever I need to really _clean_ something, this goes on the end of my pistol-grip sprayer with the threaded end.  It works well for cleaning debris off patios and walkways, too.  Yellow jackets hate it because it tears their nests right off the roof peak.  I love simplicity, and this is it.  Highly recommended.  Oh, they're extremely hard to damage, too. Keep the truck tires off it and it'll last a lifetime or two.