The pole says you dont need hot water everyday. I agree.
However using hot everyday does have its advantages, just some prefer not to. The poles results have no meaning.
I might use mine everyday in the winter, we'll see. I did at first when I first rigged mine up but decided it seemed unnecessary unless I was doing gutters/cons roofes/bird poo/bird strikes.
Im curious to know how a security guard has any inkling regarding about hot water being slower than cold water in cleaning. They have enough trouble getting off their asses to do a patrol round the block once a night.