To clean garnets at home, you should add some mild dishwashing soap liquid in warm water. Stir the water and dish soap together using a spoon or your finger. Carefully place your gemstones in the liquid you have prepared and soak it for about 20 – 30 minutes. This will help to loosen any dirt. After the soaking, use a soft toothbrush to remove the dirt. Next, rinse out your piece of jewellery with clean water and dry it with a soft and lint-free cloth.