First of all sorry if I'm posting in the wrong part of the forum
For a while now the frets on my GL Jazz Bass have been a slightly gold-ish colour. I can't understand why fretwire (especially considering its a Japanese Fender) would oxidise or rust in the first place, no matter how old the bass is (and just for the record, I bought the bass new only about a year and a half ago).
it hasn't been kept in damp conditions and I wipe the strings with a dry cloth after playing. The condition seems to worsen toward the body of the bass.
Any ideas on what the cause could be? and also if I should use steel wool to restore them to their former silver beautiful selves

even though the rust/oxidisation will surely come back
Thanks in advance!