Can I wash sterling silver and stainless steel together?
No, do not put sterling silver and silver plate in the same silverware basket with stainless steel. Contact between these different metals can damage the silver. Additionally, do not wash copper utensils in the same load as silver, as the silver may get a brown film.
From the official GE GSD570 Stainless Steel Built-In Dishwasher manual, page 10
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