An electric hair trimmer is a great tool for keeping your hair looking sharp and well-groomed. But like any other tool, it needs to be properly cared for in order to work its best. That includes regularly sharpening the blades. Fortunately, sharpening an electric hair trimmer is a relatively easy process that only takes a few minutes. First, unplug the hair trimmer from its power source and remove the blade guard. Use a fine-grit sandpaper to lightly sand the blades and wipe them clean with a soft cloth. Replace the blade guard and plug the hair trimmer back in. By following these simple steps, you can keep your electric hair trimmer performing at its best.