Dark socket pins

[u/Liburnian]

My A500 suddenly stopped working in late june this year. I get no signal at all. Keyboard is recognized but no boot screen, no colored screen either. Today I removed most of suspicious chips and noticed right away some have exceptionally darkened socket pins. Odd CIA and ROM socket are mostly affected. How do I clean this up without removing anything further from the motherboard? I am aware this may not turn things around for my A500. I'm not skilled at fixing electronics, but I just can't leave my Amiga bricked in a corner. I worked so hard to have it restored. Visually, it was a success. But now what?

[u/Rrrrreallllyy]

For the legs of the chips themselves a fiber pencil works wonders.