The answer to 'how to clean shingles' is to regularly clean your roof shingles to maintain their appearance and prevent damage. This typically involves using a soft-bristle brush, mild detergent, and water to gently scrub the shingles, then rinsing them thoroughly. It's important to avoid using harsh chemicals or power washers, as these can damage the shingles.
For best results, clean your shingles every 1-2 years, or more frequently if you live in an area with a lot of dirt, pollen, or other airborne debris. Be sure to take proper safety precautions, such as wearing non-slip shoes and using a secure ladder, and consider hiring a professional roofing contractor if you're not comfortable working on your roof.