@mijostyn-the issue I mentioned about phono stages has less to do with 'self-noise' of the phono stage and more about how it behaves in response to surface noise, tics, etc. Ralph Karsten of @atmasphere has written at length about that here.
For stylus cleaning, Ortofon advises against using any solvents that can damage the cement used to bind the stylus to the cantilever. Other cartridges- I think it is worth checking with the manufacturer-- I know Lyra promote a liquid that is safe with their cartridges which I used when I was running Lyra cartridges, but I've only dry brushed (or on occasion, used Magic Eraser or Blu-Stuff, per Peter Ledermann) with my Airtights. My Koetsu is brand new and I've only been dry brushing so far, using a longer bristle brush than the normal 'pad' type.