All metals tarnish (oxidize) over time, it is their nature. To remove dirt, or small stains, simply use gentle microfiber cloth. Dry your jewellery immediately after cleaning with soft cloth or after getting in contact with water. These rings DON’T like: water (and seawater), moisture, perfumes, chemicals, cosmetics, house cleaning and gardening! When not in use, keep it in a box in a comfortable dry place.