Even if the experiment doesn't show much in the end, it's still a good topic to bring up, especially for collectors. I collect nes games and I try to take very good care of them.

I dunno how knowledgeable you or the others are about how to properly clean nes cartridges, but does anyone here recommend against using 409? That's what I've used for the last year and it cleans them right up (I spray a little onto a dish towel, not the game itself).