Good old NES. Ive had one since i was like 6...and i got a busted connector right from the start. After about 4 years of toiling i finally bought my friends but its also, wasnt new but it was better then my old one. A few months ago i dug mine up and couldnt find the connector. So i went to the local pawn shop and bought one for 50 cents...ya...50 cents, and it worked better then my first one.
About cleaning one, i have no idea if the alcohol bath will work, but i took mine apart and did the alcohol swab thing and it worked a bit better. My advice is to keep looking around in pawn shops till ya find one. thats how i got lucky
Edit: I cant spell