Windows should typically be cleaned at least twice a year to maintain a clear view and prevent the buildup of dirt and grime. However, the ideal frequency can vary based on location and environmental factors. For instance, windows in urban areas, near construction sites, or exposed to pollution and heavy rainfall might need cleaning every three to four months. Coastal areas with salty air and regions with high pollen counts also demand more frequent cleanings. Additionally, commercial buildings often require monthly cleanings to maintain a professional appearance. Interior windows usually stay cleaner longer but should still be wiped down at least once a year to remove dust and fingerprints. Regular cleaning not only enhances the appearance but also extends the lifespan of the windows by preventing damage from contaminants.