When removing and placing protective lenses, do not directly touch the surface of the lens with your hands. Clamp the edges with your hands and handle them gently. If the protective lens is stuck due to flying slag, cannot be cleaned clean, or has been burned.

When removing and placing protective lenses, do not directly touch the surface of the lens with your hands. Clamp the edges with your hands and handle them gently. If the protective lens is stuck due to flying slag, cannot be cleaned clean, or has been burned.