House Washing: The Safe Soft Wash Method for Cleaning Your Home If you’ve noticed green algae, black streaks, or mildew on your siding, it’s a sign your home needs professional house washing. Over time, organic growth and environmental buildup can make even newer homes look dirty and neglected. Professional soft wash house washing removes these contaminants safely while protecting your siding and landscaping. At Platinum Power Wash, we use a professional soft washing process