Powerwashing

Powerwashing is a straightforward process - you get pressurized water and you aim it at a dirty surface to clean it, mission accomplished. The first step is to soak the area with water, I like to use a mixture of soap & water then later come back with a pressurized water to clean the surface.

Soft Wash is the exact same thing but with less water pressure.

Bleaching is another way you can get a dirty surface clean yeah, we use less water and more chemicals, in this case bleach.