I had a CD that I cleaned to within an inch of its life* that still wouldn't rip. After I used an Allsop CD lens cleaner, it ripped no problem. So I can testify that the lens cleaner does
something. This was probably after I had ripped 450-500 CDs. My view of the tiny brushes the cleaner uses is that for the few minutes the cleaner is in operation, they could do little or no harm to the lens. Even so, I probably wouldn't use the cleaner disc as often as 100-200 CDs.
*(1) Wiped it with Maxell CD-305 cloths, (2) soaked the cloth with a vinegar-water solution and wiped it, (3) soaked it in soapy water and rinsed, and (4) buffed it with toothpaste using my finger.