@65dBnoise ICYMI:
A photojournal post contains more info on errant sample tube #184.

As well as a nice animation of the dust removed by its 'Bore Sweep Tool', which is new to me :)

https://photojournal.jpl.nasa.gov/catalog/PIA25337

I'm assuming that the photojournal post could be part of a news release or a mission update with more details, as they often go hand-in-hand.