Contact with household chemicals, perspiration, rubber, chlorinated water, or any substances which contain sulfur (e.g., mayonnaise, eggs, mustard, onions, latex, wool), will cause corrosion and tarnish — so it’s a good idea to remove silver jewellery when doing household chores. Direct sunlight also causes silver to tarnish, so be sure to take off your silver jewellery before you go to swimming.
Lotions, cosmetics, hair spray and hair products, and perfumes are also “enemies” of silver and will accelerate tarnishing.
Storage: As exposure to air tarnishes it, storing silver in airtight plastic bags with anti-tarnish strips is a great preventative measure. Just make sure you don’t store multiple jewelry pieces in the same bag: silver is a soft metal, so the individual pieces can scratch each other. Link or chain bracelets should be kept unclasped or unhooked to prevent scratching as well.