1. Rotate 90 degrees to make the two pieces of glass and then wipe the staggered break .The cleaning cotton with detergent water soaked completely or with a glass of water, too. 2. With the spray on glass and detergent water, to provide lubrication 3. Please do not directly clip in the glass wipe dry 4.Before use, check the safety rope is strong, then the safety ring sleeve on the wrist or fingers, and firmly grip the rope