FIRST time I hearing any of this: in four years I’ve never had a CCD ‘shrink’, never read or heard a report of such a thing. OTOH, CCDs are tricky to install, require patience and practice, AND ARE EASY TO BEND DURING INSTALLATION.
The CCD in my ‘17 Omni has been in place for more than three years: it’s never shrunk, come loose, rattled around, or done anything else that would support the idea that they shrink. My ‘17 M has never had the CCD messed with: if it had shrunk after years of use, it’d have come loose inside the bowl by now, but nothing. Still tight in place: not possible if ‘repeated heating’ caused the metal of the CCD to ‘shrink ‘ to where it could no longer ‘catch the groove’. If true, the things would just turn loose.
The easiest way to FAIL at installing a CCD is literally going at it wrong: if you’re trying to drop a CCD down into an up-facing bowl, you’ll probably crap up your new CCD instead of installing it. An intensely frustrating experience. Almost as easy a way to fail is to use a ‘setting tool’ that isn’t (nearly) as wide as the bowl itself: the CCD needs to GO IN FLAT, as in *level*; it needs to grab THE ENTIRE GROOVE AT ONCE, not just a bit of it. That means the CCD needs to be *supported* during insertion, not just poked at.
George’s original vid on setting a CCD used the cap of a Bic Stik pen to accomplish this; Doc’s machine-screw/depth-gauge technique is a refinement of that. If you haven’t watched that vid of George, you should watch it several times, then try it with the vid. If you have watched it, go watch it a few more times. Details matter.
I failed to find the vid I was mentioning, but here’s one about how to do it all with just the condenser, which is a different approach, but effective enough:
If you’re *LOSING* CCDs when clearing your bowl, then your CCD IS NOT EVEN INSTALLED. You really need to go watch that video.
gosh, I sound awful stern....