Start by washing and drying your hands to remove dirt and oils from your nails. Filing: Hold the nail file at a slight angle and file from the edge towards the center in a smooth motion. Avoid sawing back and forth to protect the nails from damage. Shaping: Use the file to shape the nails into the desired form, whether round, square, or oval. Finishing: Once the nails are shaped, use the finer side of the file to smooth out any unevenness and seal the nail edge. How to clean the Nail Glass File: Rinse the nail file under warm water and let it air dry, or wipe it with a clean cloth before next use. If the file starts to dull, simply rinse it under water.