DIY soft washing usually fails when people guess chemical ratios, mix cleaners, use high pressure, skip plant and runoff protection, or ignore PPE. These errors can damage roofs, siding, landscaping, and health. DIY soft washing is a low-pressure exterior cleaning method that uses a bleach-based cleaning solution, water, and supporting cleaning agents to remove algae, mold, mildew, and surface staining from exterior materials such as asphalt shingles, vinyl...