Cleaning frequency depends on location and environment. If you live in a dusty or pollen-heavy area, you may need cleaning every few months. Generally, twice a year is sufficient for most homeowners. Solar panel cleaning is essential to maintain peak efficiency, as dirt and debris can block sunlight. Rain helps, but it doesn’t remove sticky grime or bird droppings. Use soft brushes or professional services to avoid scratches. Proper maintenance not only improves performance but also extends the lifespan of your panels. Always follow the manufacturer’s cleaning guidelines to avoid voiding warranties.