A man pressure washing the exterior walls of a house to keep the siding clean. A clean and well-cared-for home exterior feels amazing every time you pull into the driveway. We all want our homes to look their best because it shows pride and protects one of our biggest investments. That is why siding cleaning matters more than most homeowners realize. When siding looks dirty or streaky or covered in green algae, it not only hurts curb appeal but can also lead to real problems