I rarely see clean headphone jacks in used gameboys. Does anybody now a way to clean them? I tried soaking into 70% / 30% vinegar / water which works great for corroded battery contacts, but not so good for the jack. Maybe higher concentration of vinegar could help, but I'm afraid to dissolve the plastic parts.
I'm asking because for the sake of space I'd like to utilize native jack for 3.5mm pro-sound.
Thanks!