I found this on the internet. It's a cheap and easy way to clean your jewellery. Jewellery Cleaner. 1 x Tablespoon salt. 1 x Tablespoon Baking Powder. (Bi-carb Soda). 1 x Tablespoon Dish Detergent. 1 x Cup Water. 1 piece Aluminium Foil. Place water in a small bowl and heat in microwave about 2 mins. Cut foil to roughly fit the bottom of the bowl. Place salt, soda & detergent into bowl, mix gently. Add foil to bottom of bowl. Place jewellery on top of foil, leave 5 - 10 minutes. Rinse in cool water & dry. Discard solution. Make a new batch each time.