1. Remove all the mortar and pestle pieces from the bowl.
  2. Pour a pot of boiling water onto the mortar and pestle pieces, and let them soak for a few minutes.
  3. Use a plunger to suction onto one of the pestle pieces, and pull it out of the bowl.
  4. Pour cold water into the mortar and pestle, and use it to clean off any excess mortar or pestle material.