crwdns2934241:0crwdne2934241:0 Dan

crwdns2934249:0crwdne2934249:0:

The first is common tarnish, the second image is corrosion issues! Take a cotton swab dampened with White vinegar to clean off as much as you can. Hit the area again with a distilled water dampened swab to remove any traces of the vinegar. I would then hit the solder joints with some flux and refresh the solder joints as well as needed.

crwdns2915684:0crwdne2915684:0:

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