I'm going to go with the answer to all my problems. Just a tad bit of WD-40... Or maybe baking soda paste, let it soak. I would maybe do some research on just how to clean silver plated jewelry. No brasso though, that'll defiantly get rid of the plating. My personal opinion, avoid anything abrasive or acidic. Only creams and microfiber clothes. But if you have a
mod that has silver plated contacts it was probably pretty expensive so don't take just one persons input. Take a few and do some research