To Prevent Tarnish:
Store in a Zip-lock bag or Pacific cloth pouch.
Shiny Silver - Use a polishing cloth, any commercial cleaner or toothpaste.
Matte Finish silver -
Tarne-x or another dip-it type silver cleaner. I’ve had good results with Brilliant Silver Cleaner, Black. (Available online)
Make a paste of liquid detergent (dish soap) and baking soda. Scrub vigorously with a tooth brush. Works best for light tarnish.
Gold or copper included in a silver piece may be cleaned by
the same method used on the silver part. Avoid getting chemical cleaners on stones.