I just saw this @proenzaschouler twitter,
Q: do you recommend any kind of leather care for the ps1?
A: You can gently apply a little Nivea unscented lotion with a cotton cloth.
http://twitter.com/#!/proenzaschouler/statuses/96596001342767105
That's soooo funny. When my mom made her most recent purchase (the perforated black Bal), the SA told her that Bal recommends gently cleaning with unscented Lubriderm once every two weeks. So I guess we'll be Nivea girls!