Soft washing is a cleaning method using low pressure and specialized solutions (typically bleach, water, and sometimes a surfactant) to safely remove mildew, bacteria, algae and other organic stains from roofs and other building exteriors. It is so named to differentiate the method from power washing.

Why you should not use a pressure washer to clean your vinyl siding and gutters.

Cleaning vinyl siding by hand can be long and tiring, so some choose to pressure wash a house. Pressure washers save a lot of time and energy and produce clean results, but can also damage siding and cause more problems if used incorrectly.