Tarnish is a natural reaction between silver and sulfur in the air. To prevent it: apply perfume before putting on silver; remove before swimming; wipe after wearing; store in an airtight bag. For cleaning, a silver polishing cloth handles light tarnish. For heavier tarnish, soak in mild dish soap and warm water for 5-10 minutes, scrub gently, rinse, and dry completely. Contact us with questions about your pieces.