One of the most important tools in professional window cleaning is the squeegee. Its advantages are versatile, including the ability to clean windows without leaving streaks. Squeegees allow for greater control and precision, which is crucial for cleaning corners or hard-to-reach areas. Additionally, squeegees are durable, making them a cost-effective tool for any window cleaning professional. Overall, using a squeegee is essential for achieving professional-level results, making it an indispensable tool in any cleaning job.