I've got an older Fein Turbo III which I've loved for a decade now, with a Cleanstream HEPA to take better care of my lungs and avoid the crazy Fein HEPA filter prices. I hadn't cleaned the filter in a while because it's a dirty job, but last weekend I put on a dust mask and gave it a thorough cleaning.
My next task was vacuuming some dust off my workbench which was scattered with tools, and I was surprised when my Fein, no longer hobbled by a dirty filter sucked up TWO screwdrivers before I could react, and was about to gobble up a chisel. I had fun getting the screwdrivers out of the hose... I'll be more careful next time!