An update. I took it apart again, this time I took the grinder star off. The underside is a bit chewed up, gave it a clean and rubbed a pencil over the contact point with the shaft (graphite is a dry lube), and it seems to have worked. I'll order a new star which (hopefully) will be a permanent fix.
An update. I took it apart again, this time I took the grinder star off. The underside is a bit chewed up, gave it a clean and rubbed a pencil over the contact point with the shaft (graphite is a dry lube), and it seems to have worked. I'll order a new star which (hopefully) will be a permanent fix.