The vagina is a self-cleaning organ, and the secretions it produces are sterile and in the proper ph balance for the vagina. Don't put anything in it. Certainly not antibacterial soap. Wash your outer area the same way you wash the rest of your body, just don't put anything inside your vaginal area at all. If you are doing this because you have some kind of unusual odor, see the doc to be sure you don't have BV.