Everything was printing OK until half-way through today, for no apparent reason I started getting “moth-eaten” prints.

I tried re-calibrating and squishing down a little more but it didn’t change a thing.   I cleaned the nozzle, and wiped the bed.  All the settings are as per normal.  What’s the problem?


I finally broke down and squished down a whole lot more, until I was getting perfect right angles at the corners of the “First layer calibration” pattern.  That subtracted an extra 0.12  mm from the bed, and seemed to improve things a lot.

But there are still apparently random things going on that I don’t yet understand.

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