Most house washing won't reveal what they use to wash your house. It is their little secret. But I will. Mixing chlorine and detergent can be dangerous and cause a chemical reaction. PLEASE DO SOME HOMEWORK OR CONTACT ME TO FIND OUT WHAT DETERGENT IS SAFE TO USE. As you can see in the video just a little bit of chlorine in the bottle topped up with detergent and water. The venturi tool sucks up the solution and then the chlorine gets diluted again from the water coming in from the house. I do need good water pressure from the hose to reach the eaves and gutters on a two story house.