I've wondered if a CD cleaning disc is necessary in any CD player. The head does not contact the disc and therefore should not pick up any junk. The only way I can see it getting dirty is from dust or smoke in the air, and even then, it's got to make it's way into the changer first.
So if you smoke, don't put your lips up to the slot in the changer and exhale. I suspect it may be bad for it.
So far, I've never cleaned any CD player, drive or changer and I've got some pretty old ones, including an ancient one with a SCSI interface and cartridges that the disc has to be loaded into. (Guess it's time to dump that, but it's just sitting in a server being useful on occasion.)