Simple; 1) Soak overnight in cold water
       2) Rub in well the white of an egg in half a pint of guiness
       3) Soak overnight
       4) Wipe with a vinegar soaked soft cotton cloth
       5) Soak overnight
       6) Wash on the synthetics cycle of wahing machine
       7) Leave to dry for 48 hours
       8) Bring back the original sheen with a nut oil
       9) Don't play the dulcimer whilst drinking a bottle of
          tomato ketchup!