My mantra: when in doubt, use #4

5. I recently trained a green bean over the summer and the official training documents said that keurig k-cup reusable ground coffee is made at a 5 setting.

EDIT: Here's the "official" document: $1

6

i would typically grind it on “metal filter” as my default, i think that’s 6? i haven’t been at work for 2 weeks so excuse my fault brain. just bc it’s made for a coffee maker. that would be my guess, that’s what i do and i don’t have an issue!