i recently bought an old pong system and iv been having some trouble wih it, its not an atari one, its called APF tv fun im pretty sure, but i was hoping id find some help her anyways, when im playing it the paddle often jolt up and down randomly, its not to big a problem and its still playable but it just gets annoying when it screws you up every once in a while. i think the contacts for the knobs are just dirty but i took it apart and they werent exposed, i thought id get some feedback before i do anything else to it because i really dont know alot about it and dont want to break it. any help is apreciated, thanks.