Not much to know really....
1) Unscrew the hopper off
2) Carefully remove the worm gear attachment and unscrew the grind setting plastic dial. Underneath that is the cast burr carrier (stator)
3) Unscrew CLOCKWISE as burr carriers are reverse threaded, the burr carrier.
4) Unscrew the burrs and give em a good cleaning. Make sure not to strip the screws though.