How to clean a silver chain that turned black

Silver chains can be easily turned black just need a good cleaning, after which beautiful luster will come back to your chains again.
Some methods of cleaning a silver chain turned black listed here:
1.Using the solid that will be effective like toothpaste, baking soda and salt.
With a little toothpaste on the toothbrush, lightly scrub the silver. Rinse completely with warm water and rub with a soft cloth to shine.
With a paste of baking soda put on a wet toothbrush, clean the chain the same way as using toothpaste. As well, you could mix water and baking soda in a container and put the chain in the mixed liquid soaking for 5 minutes. Take it out and use a soft cloth to polish.
Sprinkle about two teaspoons of salt and two teaspoons of baking soda on an aluminum foil which is going to cover the silver chain. Keep the chain in the foil and put it in a casserole with some boiled water. Then change the foil into a bowl. After adding some fresh water, you can take it out and rinse it. Use
a soft cotton cloth to dry it.
2.Using the liquid that will help such as olive oil, vinegar and silver polish.
Try with a clean cloth soaking some olive oil, rubbing the silver chain.
Soak the silver chain in vinegar until black stains are gone. Then rinse vinegar away with water and wipe it dry with a jewelry cloth.
Silver polish. Follow the directions on the packaging. But this small bottle of liquid cleaning solution will not last forever.
According to all of above, you should learn how to clean a silver chain that turned black already. However it will always tarnish because of its own properties. Cleaning it regularly is a suggestion.