I've examined mine under magnification. Mine certainly did not have enouygh surface dust to come off on my fingers. The surface is rough and yes, if I rub it I can flake off some fine ceramic dust—but only if I rub it.
This is not dust. They're some sort of deposit in spherical beads that seems to have come from inside as part of the curing process. They are fairly tightly bonded on, but definitely come off on finger tips. And can, as suggested below be scrubbed from much of the surface. Given that most of the surface is in pores this clearly can't be a complete fix. Notice that while I was able to scrub most off the flat, they're still on the internal edges of the 'spokes':
It's hard to see, but zoom in and you'll see it's not dust in the normal sense.
I'm in agreement, it's probably nothing to be concerned about, but we're talking health issues potentially, I'd feel much better knowing what it is and that that material in that form is OK. I don't think it's safe to lump these deposits in with dust from other materials caused by a different process.
If you are concerned with particles falling out initially, you can take a old toothbrush to it and give it a gentle scrubbing first with some water. Once you rinse, let it dry completely overnight before installing. Any loose material should be removed with a brushing.
I will also have our ceramics supplier give all new S2 spacers a professional scrubbing ex-factory in the future, to remove whatever particles may be loosely attached coming out of the kiln.
I don't think there is really nothing to worry about, as you have 2 ultra fine screens that filters the airpath, with your herbs in the middle as a further filter. I don't think any particles you can see falling out from the spacer can make it through the filtration process.
Thanks. It would be nice to know what it is. I assume it's a typo, not a slip of the tongue, when you say "I don't think there is really nothing to worry about" as that's my point? It says 'I think there is really (something) to worry about' when you decode it?
As I said, I don't think it's possible to scrub them all off (over half aren't on the flat surfaces I think), but a cosmetic scrubbing would be nice. I also agree most would be blocked (but not removed) by the screen, but I pay extra money to ensure the herb I put in the bowl is free of contamination, it'd be nice to know about this frangible stuff?
No panic, nothing to base it on, but concerns?
OF