Cleaning silver can be done a few ways. Depending on the object, you can use acetone to make it look like new. Tarnished silver coins can be cleaned using acetone if done correctly. It is recommended you keep silver jewelry away from products with acetone and consult a professional jeweler before experimenting with any cleaners.
Soak any dark silver coins in a container filled with acetone or nail polish remover that contains the ingredient.
Wait until you see the dirt come off the coins and then air dry.
Pat them dry with a soft, clean cloth for faster drying time. With any type of silver you want to be gentle so it doesn't get scratched.
Keep silver items in an airtight bag for proper storage. For silver jewelry, try using warm soapy water to get them clean and let air dry.
Do not rub the coins when cleaning. It may scratch the surface and remove some of its metal. Do not wear silver jewelry in a swimming pool or when you're cleaning with ammonia or bleach because it will destroy the delicate parts of the metal. Also, be careful when wearing silver in the shower. Soap residue can build up and cause the jewelry to develop a dull finish.