<human>:  What is the best way to sharpen a kitchen knife?
<bot>: The best way to sharpen a kitchen knife is to use a whetstone or honing steel. Whetstones are made of either diamond or ceramic, and should be used according to the manufacturer's instructions. Honing steel is a metal rod or cylinder used to realign the cutting edge of a kitchen knife. Both tools should be used in an up and down motion along the blade to sharpen the knife evenly.