Baratza Encore is grinding too coarse 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.
I have the grinder myself too, and from what I recall (haven't used it for a while) the number scale doesn't correspond with a specific grind size. I haven't taken it apart, but when I would thoroughly clean it (mostly taking out residue coffee dust with a vacuum cleaner), I think I had to set it a bit finer (maybe 2 or 3 on the number scale) to achieve the same results.
Seeing that you took the grinding mechanism itself apart as well, I wouldn't be surprised if the number scale is a bit further off compared to what you were used to.
To see if you can achieve the same grind size you used before, I'd simply grind finer until you get there. If you get down to the lowest setting and the grind isn't getting to the desired level (which you previously did get from the same machine) then there's probably a problem with the way the machine was reassembled.