I also have an EOE necklace, which I have worn for a long time and like very much. I usually care about maintenance, so I will share it here. Sweat, dirt and stains will appear after wearing it for a long time, so wash it regularly, usually with warm water, and then dry it. If you don't wear it, you'd better clean it before putting it. It can be wiped with a silver cloth, not washed with water. It is best to put it alone to avoid mixing it, lest it collide with other objects and affect the gloss. If you have any questions, please ask. I wish you success in your work and good health.