I found out what Riley was doing to his nose. The run off from one of the gutters was pooling up on the ground (still don't know why it was doing this), and he was messing in it (dunking his face from what I can tell... he's not *that* big on water, though).
I took them out to the front yard tonight, put their leashes around a tree, and hosed them off, soaped them up, and rinsed them. They are drying off now in the kitchen while they sleep after a good towel drying. They're almost free! (That's how they see it, I'm sure.)