This a real quick and easy way to clean your games so they play perfectly! 1. Get cotton swabs and rubbing alcohol. 2. Dip one end of the cotton swab in the alcohol. 3. Rub (with pressure) on the metal(both sides), on the end of the cartridge where you normally blow to get them to work. DO NOT BLOW!! 4. Take the dry end, of the swab and rub (with more pressure) over the metal again. 5. Depending on how dirty the cart. is, you will see dirt build on the cotton swab. 6. Let the game sit and dry for about a 1/2 hour, before you play it. 7. Insert and have fun!! If for some reason this doesn't work, then start over with step #1 and clean it again. I own over 40 games, and they all work perfectly after spending some time cleaning them, like this. I hope this was helpful!