cleaning dirty bag that has never been treated

  1. I am going to use shining monkey on my mono speedy and epi jasmin. Problem is, neither have ever been treated, or cleaned. Before i treat for water protection, i clean the leather (specifically the mono speedy). If i need to clean it first, what do i use? how to do it? thanks.

    Also, do any of you use shining monkey on your expensive leather shoes?