How Do You Use A Wusthof Universal Knife Sharpener?
To use a Wusthof universal knife sharpener, hold the sharpener steady on a flat surface. Then, holding the knife with its blade at a 20-degree angle to the sharpener, draw the blade through the coarse side of the sharpener from heel to tip three to four times. Repeat the process on the fine side of the sharpener. Ensure that the blade stays perpendicular to the sharpener. Wipe the blade with a clean rag to remove any metal flakes.