Soft washing is a safer alternative to pressure washing, which can sometimes destroy aspects of your property. This technique uses a power washer with a low-pressure stream that cleans siding, fences, driveways, gutters, walkways, and other exterior surfaces. Combining hot water and the right amount of pressure removes stains from dirt, dust, pollutants, and contaminants. Soft washing can also kill algae, moss, and mildew.