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The original was posted on /r/askculinary by /u/AlbertWhiterose on 2023-09-14 13:46:27.

It happens with only specific items. Even if they’re perfectly clean, whenever I put them in the dishwasher they have this black stuff on it that is entirely invisible to the eye but comes off onto your hand.

Video demonstration of the residue on a pot lid:

Nothing else that goes through the dishwasher, even simultaneously, is affected. The pots are labeled dishwasher-safe.

Any idea what this is?