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Funny stained knife blades

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I am getting peculiar green/blue shiny stains on the blades of my Dansk stainless. Some of it is 40 years old, some of it is less than 2 years, but all the knives seem affected. We moved this summer, but only 4 blocks away, so I doubt the water is different, I'm using the same detergent, and we bought the same dishwasher as at the old house. Any ideas on removing it? The older flatware has been dishwasher washed since I've had it. What gives?

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  1. I don't know what causes this, but I did recently go with a friend who had silver knives with stained stainless steel blades to a silver shop in NYC where they were able to polish them up beautifully (and inexpensively) for her. She had thought the blades would have to be replaced. Don't know where you are located, but having a professional polish them up might help - and they would probably know what caused the problem.

    1. "we bought the same dishwasher as at the old house"

      your not putting your knives into the dishwasher are you?

      1 Reply
      1. re: k

        I have for 40 years.

      2. You might try cleaniung them with Never Dull metal polish. Most hardware stores carry it.