A way to ensure that there is less of a chance of your Tiffany silver reacting with outside elements would be to try to limit the amount of reactants it comes into contact with. Before handling your silver pieces you should make sure your hands are free from lotions or other skin products. Silver also reacts with designer jewelry something as common as air. To make your polishing job easier, try to store your jewelry in an airtight space. You can either purchase airtight jewelry boxes or simply place your silver pieces in a Ziploc bag and squeeze all the air out. Another option would be to purchase anti-tarnish storage bags for your jewelry pieces. These bags combine the techniques of keeping air away from your pieces while using anti-tarnish agents to protect them.