Yep, all that talk about water conducting electricity is the devil! My momma says so
Your momma is right. Water (pure water) is insulating, not conductive, and they
DO wash live power line insulators with high pressure de-mineralized water from helicopters all the time. The company I work for has done thousands of "hot washes".
Some pics of hot washing in this gallery
here.The reason you'll get zapped if you drop a toaster in your bathtub, is not the water but all the minerals and other stuff suspended in the water.