Hello
Great question!
We have two boys and two girls here and let me tell you cleaning little girls is alot harder then little boys..lol..
my rule of thumb is any fold that I can see when I pull back the outer labia, I clean. Dont go digging around looking for stuff, becuase you also dont want to clean away the natural germ fightin discharge that our amazing vaginas release either. The vagina, like the penis cleans itself. So really I guess the bottom line is clean what you see intitally. the rest the body takes care of itself, and as long as your wiping her from front to back and getting all the poo out your fine...leave the secretions though.
Phoenix