Bob, I understand what you're saying but, most people aren't going to pay someone to tear their appliances apart for a thorough cleaning. If you can get a few to use these, why not? I honestly laughed at it when the girl brought it home. After seeing what it got out of the machine, and more importantly, the fact that she likes it and uses it, is good enough for me. The vent itself is of course, a separate project, better suited for a leaf blower. Drift; The leaf blower is also the perfect tool for cleaning a shop vac filter. Just make sure you check the wind first, or you could end up with a bunch of pissed off neighbors and firemen in your yard.