Also to be checked:
On several occasions someone used my Niche and, when adjusting the grind size, was grabbing the ring way too low by the calibration ring.
Every time I wondered what had happened to my setting. I was wondering if something had gone wrong with it...
In the end, after this issue happening several times, I realised it was always after the same person had used it.
This quickly pointed out to the calibration ring being moved. So I explained well how to use it and what not to touch and since it's much more stable
May not solve issues for everybody, but at least for some it may be a quick and easy one before going any further...
Grinders are one of the keys to exceptional espresso. Discuss them here.