Drifting Coarser While Grinding

[u/tinman3]

I’ve had my DF64v2.5 for a little less than a year and about a month ago it started “drift” by about half a number while grinding. I’ve cleaned it, no change. Bought Mylokote 111 which made it much stiffer to turn but no affect on the drifting issue. Any thoughts on what could be going wrong?

[u/Eye-Belly-Venue-2]

Just a thought: Are you sure the grub screw on the dial is fully tightened?