How do I clean a hard magnet?
A: You want to make sure that you properly store your magnets at all times. Make sure you store your magnets in a cool dry place, in a closed container or box, and in attracting position to preserve magnetization. Ideally it would be best if you can store your magnets with spacers between them. In the event that that the magnets attract metal particles, you can wipe them off with a dry cloth.