I posted almost the same question in another section, but here goes. When you are cleaning a house or mobile home should you use hot or cold water? Also, I have heard you can use truck and trailer "soap" for home and mobile home siding is this true? And if the siding is painted aluminum will the truck wash hurt the paint? Also, should you use a certain pressure setting or is there no such thing? I am brand new to this, so you'll have to excuse me if I seem to ask some silly questions. Anyway, thanks for the help!