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Hi. I'm having a strange issue with this item. Inside the lid, my printer creates these strange hexagonal walls inside the tube. I sliced it with Slic3r and the preview doesn't show this anomaly.

It's not stringing - the printer actually stops at every 2mm or so and lays a small amount of plastic that builds a very thin "wall". I can't figure out why it's laying PLA down where it's not supposed to!