A barber has to sanitize and disinfect his haircut tools every time, in between every customer. You want everything you use on your client to be clean, with no exceptions. It's also the law!

Clipper Sprays: Having an all-in-one clipper spray is excellent for disinfecting quickly and cooling your clipper's blades before using them again. Turn the clippers on, hold the can a few inches from the blades, and spray lightly. Let the clippers run for a few seconds. Turn off the clipper and wipe the excess off.

The term clean refers to the precise and well-executed cut that gives a sharp and defined appearance to the hairline and neckline.