1. Unscrew and open your NES.
2. Locate and unscrew pin-connector area.
3. You know those white eraser that you see at the art store? You're gonna need one. Link: http://www.officedepot.com/a/products/9 ... 8909262716
4. Cut a sliver of it off.
5. Rub it on all of the connecting points. Avoid rubbing too hard, and avoid extensive skin contact with the connector.
6. Re-assemble NES.
Should work almost good as new. You have just gotten all of the excess crud off of your pin-connector that has been building up for 20+ years. Hope this helps!
