To use a bong cone piece, grind your cannabis to an even consistency and pack it into the cone. Lightly press the herb first, then firmly for a consistent burn. Insert the cone piece into the bong's downstem and ignite the herb while inhaling to fill the bong's neck with smoke. After a few seconds, remove the cone piece and continue inhaling until the bong's neck is cleared of smoke. Avoid overfilling or underfilling the cone piece for the desired hit. Also, make sure the downstem is fully submerged in water for a smoother smoking experience.