Industrial borescope is an instrument used to inspect the internal condition of machines and equipment. If the lens is blurred and stained, it may affect the inspection results, so it needs to be treated promptly. The following are some treatment methods. 1.Clean the lens surface: Use a clean, soft cloth to gently wipe the surface of the lens to remove stains and dust. A special industrial endoscope cleaner can be used, but be careful not to let the cleaner get inside the instrument. 2.Replace the lens: If the lens has been damaged or cleaning is ineffective, consider replacing the lens with a new one. Note that you need to know the model and specifications of the endoscope before replacing the lens. 3.Repair or replace the instrument: If the above methods are ineffective or the instrument itself has been damaged, you can consider sending it for repair or replacing the instrument.     Regardless of the method used, care needs to be taken to keep the instrument dry, clean and properly stored to ensure its long-term effectiveness.