Try not projecting bad thoughts about your cartridge's future. Worrying is generally thought to be unhealthy and does you no good. Try as much as you can to live in the moment and perhaps find some relaxation exrcersizes to calm yourself. Don't turn to drugs or over do the etoh, perhaps listening to your favorite tunes using a different source.
I don't know much, if anything, about cartridges, but why do you think it got damaged by exposure to a ferrous metal. Magnets don't discharge their magnetism just because they come into contact with a ferrous metal, why should your cartridge be any worse off because of that?
I don't know much, if anything, about cartridges, but why do you think it got damaged by exposure to a ferrous metal. Magnets don't discharge their magnetism just because they come into contact with a ferrous metal, why should your cartridge be any worse off because of that?