1, soapy water. Make a solution with soap in warm water, then soak the gold necklace in the solution, take it out after a period of time, rinse it with clear water and dry it with a soft cloth.

2, jewelry cleaning agent. Use a soft cloth or brush, dip in a proper amount of jewelry cleaning agent, and gently wipe the gold necklace, which can play a cleaning role and make the gold necklace glow again.

3. The store is clean. Usually, shops or counters that buy gold necklaces will provide free cleaning service, and gold necklaces can be sent for cleaning, which will be better handled by professionals.