cleaning a cartridge

I inherited a Grado MCZ MM stylus and cartridge and am in the process of replacing the stylus. How should I go about cleaning the cartridge (it looks like there is a bit of oxidation on the magnet and general dustiness)?

thanks much
I bet that purchasing a new one for $25 from will solve all your cleaning and rust problems.
In March, I tried to buy a new stylus tip for my Grado MCX, that had the upgraded MCZ tip. Needle Doctor and 3 other companies indicated that the MCX-MCZ cartridge and stylus tips are discontinued and no new stylus tips are availible. I bought a new Clearaudio Virtuoso Wood cartridge. It is worlds above the Grado in all areas.