Using Soap and Water
Fill two small bowls with warm water. One of the bowls will be used for washing the jewelry, while the other one will be used for rinsing it. Make sure that the bowls you are using are large enough to completely submerge the jewelry.
Add 2 to 3 drops of mild dish soap into the first bowl. If your jewelry is particularly dirty, look for a dish soap that is labeled for fighting grease.
Dip the corner of a soft, non-abrasive, lint-free cloth for instance into the soapy water. This is as a result a must for cleaning jewelry, especially if it has any gemstones, as it will prevent scratches. Try to use a microfiber cloth; it is soft, non-abrasive, and lint-free.