I have a few of those triangled welding magnets, used for work holding. I was cleaning all the small metal fileings off of them today. I used a rag to wipe them. I also tryed a aircompressor. . . It took a while, but managed to get most of the collected filings off. Still have a few left in the hard to get places. . . . .
What is your best method to clean welding magnets?