How do you sharpen a knife?
Maintain a 20-degree-angle between the sharpener and the blade of the knife.
To get the right angle, tilt your knife down halfway, then halfway again.
Next, you can either sharpen the knife towards yourself or away from yourself, whichever method you're most comfortable with.
If you sharpen with the knife towards you, remember to keep your fingers tucked under the safety guard on the handle of the sharpener.
With each stroke, alternate which side of the knife is placed on the sharpener.
You can also place the tip of the sharpener on a non-slip surface to increase stability.
When you are finished, wipe the blade with a rag. To avoid cutting yourself, do not hold the rag in your hand.