After the silverware has been washed several times, the copper on the surface is gone and the surface is pure silver. Avoid such spotting on new silverware by washing and drying new silverware by hand for the first few uses. Use the automatic rinse dispenser feature of a dishwasher. The rinse agent lowers the surface tension of the rinse water so it sheets off the surfaces and droplets don't form. or use a rinse agent in solid form that hangs on the dishwasher rack, if your dishwasher does not have an automatic rinse dispenser. Remove new silverware from the dishwasher immediately after the last rinse cycle and towel dry for the first few times.
Crest works well.
Then, be sure to store your silver in an air-tight environment so it won't tarnish again as quickly. Never put real silverware into the dishwasher, the detergent is much too caustic and will damage it. Also, don't store with stainlessware, there's some type of chemical reaction that seems to stain the silver. I wrap mine in plastic bags . Click here to receive up to four Free estimates from prescreened and insured contractors.