Peel the paper of your wax pencil towards the base of the pencil, so that approximately ¼" (6-7mm) of wax is exposed.

Starting from side A, insert the pencil into the sharpener shaft with the wax end first.

Using the sharpener guide, use a razor blade to shave the wax until it is flush with the guide.

Turn the pencil over and repeat this process on side B, this time using the opposite side of the wax to shave.

Continue turning the pencil over and shaving the wax on the C and D sides.