What do you guys use on leather?

Its rare when I detail my car (beyond just a normal car wash), and when I do I'm a perfectionist. I have Zaino leather conditioner and that leather cleaner stuff, but my question is, what type of applicator or "brush" do you use to do leather?

I wanna be able to get my leather as clean and healthy as humanly possible. Also, my rear seat, the top has hardened, is there anyway to get it soft again like the rest of the leather? I'm going to assume no though, but figure I'd ask. . .

I used Lexol for years and switched to Zaino before I started selling it, the Zaino leather products work very well, I apply my Z-10 with a Zaino applicator and for Z-9 cleaner I use a cotton towel, from Kevin. ;)

I use Lexol conditioner and cleaner which is one of the best brands around. Any conditoner should be good though, as long as it has UV protectant, just don't buy some 99 cent garbage.

Meguiers has a new product out called "Leather Wipes"; I've bought it the other day, and am quite impressed.