How do you fix video games

Actually,it all depends on what type of game you have.Like Nintendo64 games can be cleaned with a q-tip while games that are more modern such as XBOX360 or PS3 games have to be cleaned or fixed by a certain spray or device.The spray can be found @ CD Wizard.I hope I was any help.(^^)
P.S-I wouldn't highly recommend using the device,I'd use the spray and before you purchase the spray make sure it's the rite one and ask the guy/girl if it's the rite one for the game you are trying to fix.(**)Also read the instructions on either of the game repairing utensils carefully and follow them good.($$)