Ask her why.
If it's because it feels good, tell her that that's OK but that the baby wipes contain chemicals that aren't good for that area of her body. They can cause yeast infections for one.
If she keeps finding a "snotty" discharge, it's time for the "talk" though it might still be a few years before she starts her cycle.
If she is scratching itches or has pain, she needs to be seen.
In any case, consider getting a copy of "The Care and Keeping of You". It will help her learn what is going to happen to her body and how to take care of her body.
at 12:39 PM on Jul. 11, 2008