If the bellow ruptured, it seems like it would have made a path from the pitot to static which would have made the altimeter readings wierd.

From Dave's story, it might be worth putting the affected instruments in a sealed bag of fresh dessicant to dry them out. A cell phone that was run thru the wash takes about 24 hours, so a week should be more that enough time to know for sure if this will help.

Good luck.