Each piece of jewelry is packed with a care instructions card.
I recommend storing your jewelry in a zip-top baggie or in an anti-tarnish container when not in use to slow the effects tarnish. If you notice your jewelry tarnishing, simply buff it with a soft cloth or a jewelry polishing cloth. Beware of harsh cleaners and if you elect to use a cleaner, please check instructions to be sure it is suitable for sterling silver. Never use glass or household cleaners as they cause pitting in the metal.
Please note, jewelry cleaners will remove oxidation from pieces that have purposely been darkened and should not be used on those pieces.