I have a polo shirt with my newly made up name on it and my ladder and gear and leaflets. Should I always knock on door and not just leave a leaflet through letter box? I just have a car with magnetci signs and a ladder on roof. What should I say when they answer the door? And was told to get houses near each other so as not to be driving all over the place, how do I make sure this happens? What if others are doing cleaning at the houses I ask at?