Lost stylus seeking similar experience

With a magnifying mirror under the cartridge, and decent amount of reflected light, you can see which ones have a blob of glue, and which ones are into a laser cut hole in the cantilever, any speck of glue would be on top, out of sight, not the bottom. I occasionally use stylus cleaner on them, not the ones with visible blobs.

Faustuss, thank you for reminding me/us that LAST did make two different products, one for cleaning and the other was Stylast, for lubricating the stylus. I am embarrassed because I used to own both and probably still do have them stashed away somewhere.  I stopped using them probably 20 years ago, but the product I used most was the cleaner, not Stylast.  As I recall, the bottles were numbered, maybe "4" and "5", respectively.  All of that said, I still do not think either product could have contained any solvent capable of eating epoxy bonds, if for no other reason than the given longevity of the solutions as described by LAST.  Anything that can affect epoxy would be volatile and probably would contain acetone or a derivative. Acetone has a distinct odor, and both solutions were odorless, as I recall. And acetone would evaporate off after a few weeks or months. Plus, epoxy adhesives were strong enough to bond ceramic tiles to the space shuttle nose cone during re-entry.  I don't think there is any inherent fault with epoxy for glueing a stylus to a cantilever, per se. I am guessing that the occasional stylus is not properly glued to the cantilever in the first place, during manufacture, such that the trauma of repeated brushing might eventually loosen it.

A few additional thoughts based on the further comments.  First and foremost, I want to thank everyone for the attention you have all paid to my problem.  I deeply appreciate all of your kind thoughts and help.  There is always the possibility that my particular cartridge did not have the best bond between stylus and cantilever.  Who knows?  I am persuaded that the fault is mostly on me.  Finally, a further comment on Last products and their compatibility with other products.  I have used LAST products for decades with no trouble.  In particular Stylast on the stylus does add to stylus life.  I do check all of my cartridges for stylus wear semi-annually using a Wild-Herrbrugg micorscope and in years gone by I did a controlled experiment where I interchangeably used two stylii, one treated and one left untreated with Stylast.  The treated one lasted for over twice as long, meaning the useable life was greater than 2 untreated ones (I gave up the experiment after the second stylus wore out with the treated one still in useable condition).  The cartridge was a Shure V15 III.  FWIW, I have never tried LAST record cleaner, perhaps it would provide even better results.

@lewm 

"Plus, epoxy adhesives were strong enough to bond ceramic tiles to the space shuttle nose cone during re-entry."

The whole fuselage was covered with ceramic tiles and if you recall they had a persistent problem them falling off during launch. We even lost one during re-entry because the tiles were in a critical area on the underside exposed to the intense heat from it. I was sitting in a local Meineke having one of the rims on my car straitened as the Columbia streaked across the sky and broke up in seconds on the waiting room TV.

Hey, I do know they occasionally lost a tile, but there were thousands (at least) on the fuselage.  (Sounds like you may know the exact number; I am too tired to Google it.). You're not disputing that epoxy based adhesives are typically very reliable even under stress, are you?  As you know, the Columbia disaster had nothing to do with epoxy or ceramic tiles.

OK. I googled. 30,000 tiles.