Self-cleaning method:
A, alcohol and soap cleaning, with a soft cloth dipped in soapy water and hotel cleaning, don't use toothpaste and other particles, so as not to scratch the appearance, scrubbing once a week will shine.
Second, soak in ammonia water. 18K gold necklace is dirty. Soak it in ammonia for one night, and the dirt can be washed off. Be careful that the concentration is not too high, so as not to corrode the protective film.
Third, alcohol lamp baking, often the necklace has white spots on the outside, mainly because some cosmetics containing tributes are used and stained on its surface. Tribute can be melted when it meets high temperature, and then it can be gently wiped with a soft cloth.
Fourth, you can use an old toothbrush dipped in neutral cleaning solution or commercially available jewelry cleaning solution, and gently brush the bottom of the base and the fine seam inlaid with diamonds, otherwise the gems will be eclipsed because of the overall transparency.