Rich1939 wrote:
Life in the electronics age!
I hope you never have to do that again. If you do I find baking soda works real well for that. Make up a paste, smear it on the affected areas with a Q-tip and go have a beer or three, come back and rinse it off. It should be almost pristine.
Sometimes the corrosion is so bad that it permanently discolors the contacts regardless of how much cleaning is done.