Glen Campbell, a world-class, once-in-a-generation music virtuoso whose instrument just happened to be guitar and whose native style was radio-friendly country & western, has died. He was 81.

It's ok if you put it off – I've done it too, but sooner or later you will need to clean and polish your guitar frets. You owe your guitar the chance to be its best, and grimy oxidised frets are not ...