Salon Board:Nails should always be filed when dry to ensure smooth edges.Place the board under the nail edge an file in one direction only.To clean,brush board under runnig water,then pat dry and allow to air dry.Nail File:Nails should always be filed when dry to ensure smooth edges.Place the sapphire file under the nail edge at a slant and file in one direction only.Back and forth filing may cause cracking and splitting.For best results,nails sould be filed into an oval shape following the contour of the fingertip.Filing into a point weakens the nail.