I own the super jolly model grinder

Question

I decided I should clean it. I unplugged it and unscrewed the ring clockwise, after unscrewing the s***w part way and leaving it attached. It came apart great and I brushed away all traces of grounds and used a cloth to wipe some also. When I tried to s***w the ring back onto the machine, it doesn't want to go on far enough before it just stops. I'm afraid to force it any more. I don't know what to guage it on.