Should you use cleaner on your stylus?

I am hearing two diferent arguments on cleaning my stylus, I have a CA Aurum Beta S Mk. 2 MM cartridge on a JMW9 TA and 2 grams of pressure:
1) Should I use a cleaner, and if so what one?
2) What is the best stylus brush to use? Brand name please.
3) How often (hours of use) should I clean it, based on relatively clean LP's