Listing out details as I best know. I'm stuck on what might be wrong or if there is anything I can do.

* Purchased used Baratza Encore off Facebook Marketplace 2.5 months ago
* Been using grinder every single day, mainly for Chemex pourovers, in the 18-22 grind size range
* A couple days ago, noticed it was grinder very coarse in my usual range. Also, doesn't seem like much of a difference between 16 - 22
* I took the grinder apart to recalibrate the little screw. Moved it into the fine section to calibrate the grinder finer
* Same problem. No difference in grind between 16-22, haven't tried outside those ranges yet, and it's grinding very coarse, like french press or even cold brew size.

Any ideas on what I can do, or is it time for a new grinder? Thanks.