I’ve largely avoided liquids but when I had Lyra cartridges, they promoted a liquid so I used it periodically but mainly relied on dry brushing.
I stopped using any dunk-em type cleaner- whether the Zerodust (which, to me didn’t do much more than a dry brush), Magic Eraser (which could really get the crud off) of any of the Blu-stuff that Peter L. recommends. Why?
I don’t want to unnaturally torque the cantilever assembly- that pulling down when dunking now gives me the willies. I have no anecdotal reports of mishaps, but I don’t want one either with the cost of high end cartridges today.
I dry brush using a brush with longer softer bristles than the typical stylus "pad" type brush. I did buy some AIVS liquid stylus cleaner that I’ve used once. I keep an eye on the stylus using loupes and magnifying glasses.