I found a box of Dremel-size (1/8" shank) cutters at a yard sale for a couple $$ and just couldn't pass it. Many (most

) are clogged with what appears to be aluminum. Is there a way to unclog them short of picking it out with a scribe?
Even if I have to toss (oh no!) the clogged ones there are enough of the useable ones that I won't feel too bad - I'd just feel a lot better if I could salvage them
robotic regards,
Tom