Absolutely agree just me I think as like I say I have passed driving to other jobs and they seem clean.Not many people respond to leaflets even if they want the service, think if you leafletted 1000 houses and canvassed the same 1000 guaranteed you would pick up far more canvassing. So the fact you leafletted a house doesnt mean anything other than they were too lazy to ring, too scared to ring, forgot or lost leaflet etc.
May be they cleaned them them self
Thanks