Hopefully this will answer any questions regarding "laser life": 1. The wii laser, like any other drive laser, consists of a laser diode emitting a very shot wavelength light invisible to the eye. That light passes through a one way mirror prism then through a focus lense and then hits the disc. The disc then "mirrors" the light back through the focus lense and and gets diverted by the mirror prism to be detected by a light sensitive photo diode or photo transistor. 2. The focus lense consists of a lense wich is mounted on a copperwire coil wich in itself is mounted around or very near a metal bracket. If the light beam is out of focus(the wii cant read the disc) the drive will adjust the current flowing through the copper coil either raising or lowering the lense, ergo; changing the light beams focus. 3. The "clicking" noise in the drive can be two things: The focus coil hitting the lowest point on the bracket, not dangerous in any way. Or it could be drive sled making a stop and turning the other way very quickly, or many short stops after. It is not the "laser assembly", like someone stated, since it is stationary, the only thing moving in the "laser assembly" is the focus lense. In short: Lasers do not take any damage what so ever from different kind of media. If youve got any questions post here or PM me. //jontte, electrical engineer and electronics technician..