I sold a few NES games on Craigslist yesterday and when the buyer picked up the games, he asked how I clean my games.

"Q-tip and a bit of rubbing alcohol typically."

"Oh you shouldn't do that, the alcohol can seep into the board. You should use sandpaper, it works great."

I've never heard of using sandpaper before, maybe to get off some corrosion but otherwise I don't see the practical application of it.

Has anyone tried using sandpaper on their cart games?