How to do when hair clipper blade rust is not sharp anymore？

1. First of all, remove the blade of the electric hair clipper and unload it into a blade as shown in the picture below.
2, then use a toothbrush to clean the hair on the hair clipper blade, in order to prevent being cut it is best to wear thick gloves.
3. Then use this cylindrical magnet to adsorb on the blade of the electric hair clipper, so that you can hold it by hand.
4, then open the grinding machine of the blade of the electric hair clipper, pour the grinding powder, and pour some evenly.
5. Then hold the magnet with the blade in your hand and grind it back and forth on the grinding machine until the blade becomes sharp.