Cleaning your Classy crystal nail files is easy. Simply rinse with warm water or use a little soap and water, if you prefer. Dry with a towel or allow to air-dry before replacing protective sheath.
Filing your nails correctly - File in one direction from the outside of the nail to the center. Repeat from the opposite side to the center. Filing back and forth (like a saw) will weaken nails and encourage splitting and chipping.