Well, now that I've read the whole thing, I have to sub!
Good for you, OP, for writing those letters and following up.
I've never heard of "cleaning" or lube-ing the vagina during birth- it's never been mentioned by any of my birth center or homebirth midwives. Why would it need to be cleaned- isn't the natural bacteria there beneficial for the baby? And if lubrication is needed then how are all these babies being born for millenia without it?
It's just puzzling to me to hear several of you say this is common practice!