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[Challenge-Solved] Round 3
(sh.itjust.works)
As a nurse, I can tell you what my first thought was, but no (also walnut would be a terrible material for that).
No, it's not a universal requirement nor is it particularly determined by the quality of your beans/grinder. Some very expensive grinders have anti-static mechanisms and better grinders typically have less static cling and retention. It's also not so much about handling the grounds as it is about preventing small amounts of grounds from clinging to the inside of the grinder or your dosing cup.