I discovered a Couple Unique ways to Restore My Old Video Games Systems. From Atari, Coleco Vision, Nintendo, Sega, Commodore Games, etc.

Most of use will clean our old games with a cue tip and rubbing alcohol. One problem is your average Rubbing Alcohol has 30% water in it. Which water will corrode the connectors, very quickly. So what should you do:

If you do have a 70% Rubbing Alcohol Solution, pour about a 1/2 a cup in a pot, and bring to a boil. Be careful no to boil the solution to long, as the alcohol will catch on fire. (Stand Back) When bringing the Rubbing Alcohol to a boil, the water will evaporate, and you'll have a concentrated Solution to clean your games. Make Sure to let it cool down.

You could also look to find a higher rubbing alcohol solution, but 100% is hard to find.

Now you’re ready To Clean:

• You'll need a small square sponge section, a lint free rag, and pair of needle nose pliers.
•  What you need to do, is rub both sides of your game connectors for about 10 seconds each side. Do this by dipping the sponge in the alcohol solution. And press gently and rub side to side for about 10 seconds. (I use the pliers to hold the sponge.) Then wipe the connectors dry with a lint free rag. You can use cue tips, just make sure you don't leave any cotton on the connectors.

Just be careful not to put too much in side the system as, you could damage the pin connector.
Your games should be clean. The best way to store your games is in a dry dark place. Preferably in a protective case or a bag, to safe storage.

The Ultimate Tip:

Use 180 or 240 Fine Grit Sand Paper, and rub it in an up and down motion on the connectors.

• This works great on your games, and pin connectors. 
• I turned none working games, into perfect working games, with just using a little sandpaper.
• All you need to do is, cut a small square of sand paper, and you’re ready to go.
• As you do this, the sandpaper will turn black, which is from the carbon you are removing from the connectors.

I generally will keep a can of Dust Off around, Pressurized air in a can. This is great for preventative maintenance for your games and systems.

The Last Option I have used:

A pencil eraser, this works great as well

How to fix your Old Nintendo:

If you’re like me you've probably hit that old Nintendo, played it upside down, shook it until your arm hurts. Just to get your favorite game to work in your Nintendo. I have an Easy Solution: Buy Brand New 72 Pin Connector.

So install that new pin connector, and your system will work like new, I promise.

Follow the Step By Step Video