2. Secondly, hold the position of the nose rest of glasses with your left hand, and hold the screwdriver with your right hand, and start to align with the groove on the small screw head on the nose rest and start to loosen it counterclockwise.
3. Finally, pull out the small screw from the screw hole of the nose pad, find a new nose pad or a good nose pad to be replaced on other glasses, put the small screw into the installation hole of the new nose pad, put it in the position where the nose pad is installed, and tighten the small screw clockwise with a small screwdriver.