If you want your jewellery to glitter, you could take it to the jeweller and get it cleaned, spending a lot in the process. Or you could just soak it in a bowl of dishwashing liquid and water for a quick, DIY sparkle.
Consumer Reports suggests the home-cleaning alternative:
For plain gold jewllery and diamonds, you can soak them in warm dishwashing liquid and water. Use a toothbrush to clean the settings. Dry with a soft shammy cloth.
If you want to regain the original shine of your silverware, Consumer Reports resorts to an old trick for polishing silver: toothpaste -- ideally, tartar control toothpaste.
Get a great deal at jewelry stores and learn how to avoid costly rip-offs [Consumer Reports]