A question for the nut stranglers. I have a Congreve type clock, for those who don't know this is a clock that doesn't have hands but uses steel balls to indicate the time. My problem is that the steel balls have become magnatised and this is causing the clock to become in-accurate. I somehow need to demagnatise the balls, has anyone any idea how I can achieve this? Over to the collective brain power of ARRSE.