After each use, knock the top of the grinder against the heel of your hand. This discourages peppercorns or rock salt from getting lodged in the grinding mechanism. It is also best practice to knock the grinder with the heel of your hand before turning the top knob for a finer grind.
Regularly remove the top knob and dust with a soft brush to remove finely ground spices.
Note: To prevent battery corrosion, remove batteries if not using for extended periods. Store in a cool dry place.