You can answer this way: hello, let me explain it to you. You said this situation has not subsided. There are several reasons for the blackening of K gold, including perfume, hair gel and makeup. These series are all chemicals. If they collide with 18 K gold to a certain extent, large or small chemical reactions will occur, causing damage to them. Affect the brightness of 18k gold. So be careful to avoid these when wearing 18K gold. We can clean it for you here. A moment, please.

I referred to the above knowledge of Liu Fuyin Jubilee Jewelry Network. You can refer to it If you want to know more clearly, you can go to Baidu Xiaxiliufu Jewelry Network.