This seems to work, although there is not way to be sure except, perhaps, by inference. That is, if a drive that was not working is suddenly okay again, it probably helped. Best not to set hopes too high as, if you are having trouble with a drive, cleaning the lens may not be the most likely cause of the problem. For the drive we tried it on, the problem persists, and I am now fairly certain that it is the drive itself. So, if nothing else, it can tell you that a dusty lens is or is not the problem. The price is fair. It did not seem to cause any trouble, so is presumable safe. Also comes with a plethora of sound tests, which some may find valuable.