Just taken possession of a new strat (more to follow) but I have noticed that at the high end, the frets seem to have never been cleaned & seem to have a tang to them. I've cleaned the neck (maple) with some lemon oil which has taken the worst off, but it seems, well...not ingrained, but needs a bloody good clean, only problem is I haven't got a clue what to use for the best of the frets & neck. Can anyone put me in the right direction please?