Most people typically have their windows cleaned twice a year. Spring and fall are the most common times, aligning with seasonal cleanups. However, this frequency can vary based on factors such as location, climate, and personal preferences. In urban areas with higher pollution, windows may need cleaning more frequently, perhaps quarterly. Homes near the ocean might require more frequent cleaning due to salt buildup. For businesses and commercial properties, monthly or bi-monthly cleanings are more common to maintain a professional appearance. Ultimately, the frequency of window cleaning depends on individual circumstances and environmental factors.