White gold is rhodium-plated for added protection, and to achieve that distinctive white sheen. That layer of rhodium is vulnerable, so you have to take care with rough surfaces, alcohol and other corrosive cleaning agents. To clean white gold, soak the jewellery in warm water with mild dishwashing liquid without ammonia and phosphates. Scrub gently with a soft toothbrush, and rinse in clean warm water. Dry your jewellery with a soft towel. If your white gold jewellery is set with diamonds or gemstones, take special care with the brush so as not to damage the stone.