Nintendo Nes Security 3 Tool Video Game Cartridge Cleaning Kit Clean your NES 8 bit Nintendo Games like new includes special keys to open most Cartridge games and systems To clean cartridge games that can not be opened such as Atari games you just need to apply the cleaning paste on the Video Game contacts let dry for 2 minutes wipe off with non static wipe and then wipe on the residue cleaner and you are finished you can use the triwing scredriver with the non static wipe wrapped around it or you can use a butter knife