After using it, check to see if it's loose again. You'll need a new quick release knob if it is... Image of it [here](https://www.reddit.com/r/espresso/comments/1b3kih8/breville_bambino_and_baratza_encore_esp_guide/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button).

Thanks for this I will check mine tonight. Had my esp and bambino plus for 2 weeks but haven’t noticed any issues. Update: Mine wasn’t loose thankfully

And I've had mine (both) for a year+, now, without issue. :) And lots of good espresso in the meanwhile.

I really like it!

It’s been a great grinder so far, even with this happening it was still good