I had always (past 25 years) used a short stiff bristle brush and occasionally, after 6 - 8 LP's, a drop of Disc Doctor fluid, no problem.
A few months ago I did another cartridge upgrade to a quite expensive ($3600) new cartridge, which I am very happy with. I decided to make a inquiry to the maker. I received a reply in about 6 hours, quote his reply here.
"The cartridge needs no maintenance except for occasional cleaning of the stylus tip. Use a soft stylus brush to brush only from back to front in order to avoid damage. If a deposit appears on the stylus tip, use a small quantity of alcohol and distilled water mixed half and half."
So, that is what I do.