[George]

I wouldn't be without a can of contact cleaner.

Good for switches, jacks, plugs, etc., any of which can cause a static as they age, including mike jacks. Just spray a bit into the plug, insert the jack and turn it around and in and out a bit to clean both, and static is gone.

It's available in most any electronic supply store that caters to electronic service repair men. Last I knew, Radio Shack had it.