Dampen the sock slightly under cool running water, and squeeze a pearl-sized drop of toothpaste or polish on your "gloved" fingertip.
Apply the toothpaste to the silver using up-and-down, rather than circular, strokes until the tarnish is gone.
Use a twisted bit of rag or a toothbrush to get between tines and other tight spaces.
Rinse well and polish it dry with the clean, dry side of the sock.
Cleaning Tips to Prevent Future Tarnish
Keep silverware clean and looking its best:
For general silverware cleaning, rinse under warm running water and
use a mild soap, such as dishwashing liquid, to remove surface dirt.
the urge to submerge: less is more with this precious metal.
gloves while cleaning to protect the silverware from fingerprints. Cotton is best, but rubber works, as long as you wash a new pair first.
(Any sulfur that remains on the gloves could tarnish the silver.)
Storing Silverware Safely
Store silverware in an airtight plastic bag or in a chest lined with tarnish-resistant flannel.
Resist the urge to bundle it in rubber bands: rubber can also cause discoloration.
Avoid serving sulfur-containing foods such as mayonnaise and eggs from your platters - they'll cause tarnishing.
Always test a small area first to make sure the polish is compatible with your piece before tackling the entirety.