In Virginia, most solar panels benefit from professional cleaning at least twice per year, with some installations requiring quarterly service. The frequency depends on several factors specific to your location. If your home in Dooms is surrounded by tall trees, you’ll likely need more frequent cleaning due to increased bird activity, falling leaves, and organic debris. Virginia’s humid climate can also promote faster buildup of organic materials that stick to panel surfaces. Panels installed at angles less than 5 degrees retain debris regardless of rainfall, while those facing prevailing winds or located near highways, farms, or airports accumulate dust faster. The best indicator is monitoring your system’s performance – if output drops below 85% of expected capacity, it’s time for professional cleaning.