To clean gold jewellery place ½ cup unfiltered apple cider vinegar into a bowl and submerge authentic gold jewellery into the solution for 10 to 15 minutes. Remove and buff with a soft jewellery cloth. Or make a paste by mixing 2 teaspoons of salt, 2 teaspoons of cornflour and white vinegar together in a bowl, use just enough vinegar to form a thick paste. Dip a clean, dry microfibre cloth into the mixture and rub it all over the surface of the item you need to clean. Let the paste work for an hour and rinse with warm water; buff dry and see your metals sparkle. This paste is highly effective on gold, silver, steel and pewter.
Note: Do not use this cleaning method on jewellery containing gems, enamel or precious stones.