How do you clean your slant six plugs, or do you even clean them at all?

Ricks70Duster340 said
Was the #1 plug dark like that before changing the wires? Did you change the distributor cap & rotor as well?

I'm not sure what the #1 plug looked like prior to changing the wires, because I didn't check it. But yes, I did replace the cap and rotor.