This is commonly called a hermie, but is actually an "intersexual" and most often occurs at the end of flower cycle. Pick as many off as you can, yes, spraying water kills the pollen that hasn't already done harm. It is a reaction to stress, age, and the desire for the plant to complete it's life cycle.

I advise you to check the trichomes, as soon as cloudy, harvest or risk another week. You see, once pollenated the cola puts all effort into seed production, not the sticky THC to attract pollen. The quality of the product does decrease, depending on how badly it has been fertilized and is working on seeds.

You will have nanners you can't see in the buds.....