@lewm- I think the concern in general terms (I can’t speak to chemistry as such) was that solvents, including alcohol, could dissolve the glue that binds the diamond to the cantilever. Ortofon in particular was a brand that warned about this at one point, but for the purposes of this post, I did not pull up their current statement on the subject.
Thus, the concern about using a liquid that might cause damage by "ungluing" the stylus from the cantilever. Others may be able to speak more knowledgeably about this than me. I have used liquids in extreme cases, where gunk got on the stylus despite deep cleaning. And I did use the Lyra liquid when I owned their cartridges because it was recommended by the cartridge manufacturer. Beyond that, I guess I’ll let others take the lead. Hope that wasn’t a blithering insight into the obvious.
Thus, the concern about using a liquid that might cause damage by "ungluing" the stylus from the cantilever. Others may be able to speak more knowledgeably about this than me. I have used liquids in extreme cases, where gunk got on the stylus despite deep cleaning. And I did use the Lyra liquid when I owned their cartridges because it was recommended by the cartridge manufacturer. Beyond that, I guess I’ll let others take the lead. Hope that wasn’t a blithering insight into the obvious.