Title: Is those stainless steel polish toxic?
Product review: I bought the 7-piece set and I like it. If you run a kitchen paper towel over inside the lid especially the curve area of the lid, you will see some black residue, I believe those are polish residue. Does anynoe know whether they are toxic and how to effectively to remove it? Using hot water with detergent or even put it in dish washer does not effectively remove those residue
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