Hi,
I have had a TT since 1986, but must say I was never seriously into it until very recently. Initially I was using the Canton stylus cleaning solution with the little brush that came with it. This was bought in Germany a long time ago. When it all got consumed, I got a 75% solution of Isopropyl alcohol. Recently I heard that using alcohol may dissolve the glue that fixes the needle to the cantilever and the needle may fall off after repeated use. Very recently I got myself the Clearaudio "Elixir of Sound" stylus cleaning solution (from elusivedisc.com for about USD 30) which explicitly says that it contains almost no alcohol. I usually clean the stylus once for every record I play, with a few very light strokes from the cantilever side to the tip of the needle using the brush supplied with the liquid.
Regards.