Whisk Away The Dust
The filter on my air cleaner needs cleaned periodically to maintain its efficiency. But trying to vacuum the caked-on dust from the cloth filter wasn’t working.
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Watching my wife whisking eggs in the kitchen, it occurred to me to use a whisk inserted into the end of the vacuum hose. This way, the filter doesn't get sucked onto the hose and the whisk works great to loosen the sawdust on the filter.
Insert the handle end of a dollar-store whisk into the vacuum hose extension. Drill two small, opposing holes in the extension aligned with the loop on the whisk handle. Thread a copper wire through the holes and whisk handle before twisting the ends tightly together.