Wash the silverware by hand, using mild dish soap, or in the dishwasher. Oneida advises that their silverware is dishwasher safe, but it cannot be washed with aluminum or other metal items in the same load.
Dry the silverware with a soft cotton cloth immediately after washing, so water spots don't develop.
Dampen the cloth, sprinkle baking soda on it and polish away any tarnished spots. Moisten and add more baking soda to the cloth, as necessary.
Rinse the silverware in clear water and dry with a clean cloth. Store the silverware in a tarnish-proof chest or bag, which helps slow the oxidation process.