First remove all utensils from your pencil case. If you shake it properly, residues (granite dust, eraser particles, broken leads) will trickle out. If necessary, take a vacuum cleaner and suck up the remaining fuzz. If your leather pencil case is very dirty, clean it carefully with a damp cloth. The felt pencil case can also be cleaned under running water with a little soap and a soft sponge if it is very dirty. Make sure that you only use lukewarm water and do not rub too much. Dry your pencil case, stuffed with newspaper and closed in an airy place, before filling it again.