Cleanest Windshield In Australia

I am convinced that I can spot American drivers in Australia simply by examining their windshields. They are the cleanest windshields on the road. Not because Americans are particularly fastidious about cleaning our cars, we aren't. It is because the turn signal control is on the right on the steering wheel and the windshield wiper control is on the left. For over 20 years, I've used my left hand to operate the turn signal control and old habits are hard to break. So I've inadvertently cleaned my windshield just before almost every turn I've made during the last few days here.