Gold jewellery doesn't actually tarnish, but sometimes it can appear that way because of the other metals mixed in with it. According to ColorSpark Studio, because gold is soft, it is often mixed with other metals to become an alloy; "the silver and copper in the alloy may react to the oxygen, sulphur and moisture in the air and eventually turn the gold jewellery dark." Gold jewellery also can get a dirty appearance from oils or lotions from your skin. To clean your gold jewellery, all you will need is some common household items; no need for expensive jewellery cleaners.
Squirt a small amount of mild dish detergent in a bowl, and fill it with warm water. Immerse your gold rings, and let them soak for five to 10 minutes.
Rub the rings with your fingers inside the bowl to remove any tarnished appearance or dirt. If the rings are especially dirty, scrub them gently with a baby toothbrush.
Rinse the rings with warm water, pat them with a cotton cloth, and let them air-dry. Return the rings to your jewellery box only after they have dried completely.
Gold scratches easily, so do not use abrasive brushes to clean it.