In comparison to the old brush and pole technique, There is certainly none. I joke with my clients stating I really feel like I ought to give refunds to Anyone who I cleaned which has a brush. The spinning method does a much better position. The spinning process also involves https://www.google.com/maps/d/edit?mid=10ZXl5UFht1o6OOW7OBdOACfc7iOJXH8&usp=sharing