Avoid Contact with Chemical Substances: Chemical substances such as perfume, hairspray, cosmetics, and cleaning agents in daily life may react with brass, causing its surface to discolor or corrode. Therefore, when wearing brass earrings, you should apply perfume, cosmetics, etc. first, and put on the earrings after they are dry. When doing housework or coming into contact with chemical drugs, it is best to take off the  jewelry.
Avoid Friction with Hard Objects: Although the hardness of brass is relatively high, it can still be scratched by harder objects. During the wearing process, avoid the friction between the earrings and hard objects such as gemstones and metal ornaments to prevent scratching the surface and affecting the appearance. At the same time, when not wearing them, the brass earrings should be stored separately. You can use a jewelry box or a sealed bag to prevent them from colliding with other jewelry.

Clean with a Mild Detergent: Regularly wipe the brass earrings with a clean and soft wet cloth to remove the dust and dirt on the surface. If there are more stains on the surface of the earrings, you can use a mild detergent, such as a neutral dishwashing liquid, dilute it in warm water, then gently brush the earrings with a soft-bristled brush, rinse them thoroughly with clean water, and finally dry them with a clean soft cloth.
Wipe with Lemon Juice or White Vinegar: Lemon juice or white vinegar has a certain acidity, which can help remove the oxide layer on the surface of brass and restore its luster. Pour lemon juice or white vinegar on a soft cloth and gently wipe the surface of the earrings, then rinse with clean water and dry. However, it should be noted that this method should not be used too frequently to avoid damaging the brass.

Keep It Dry: A humid environment is likely to cause brass to rust, so the brass earrings should be stored in a dry and ventilated place. You can put some desiccants, such as silica gel particles, in the jewelry box where the earrings are stored to absorb the moisture in the air and keep the environment dry.