Sorry everybody if I was a bit vague here. I was guessing the pictures
could explain themselves... The first picture is the inside of the top
pleated filter on my Jet 1100A DC. It is caked in sawdust. The second
picture is after I shook/scraped/brushed and vacuumed the pleats.
Seems weird to use the built-in house vacuum to clean out a dust
collector, but it worked great. Doug - Thanks for the compressed air
tip - good idea. - Mark