If it needs cleaning, then cleaning may help (open up and air duster, though not too close to the lens). Kill or cure with a cleaning disk - NOTHING is meant to contact the lens, so they can do more harm than good.
Delicate mechanical parts, delicate electronic parts, and with the current price and improved performance / new media codes of later drives, it's not worth spending much time or effort on a drive, even if it cost silly money when it WAS new.