We are California Window Cleaning and proud to call Sonoma our home for more than 20 years. Dave's grandfather was best friends with the inventor of the squeegee and taught him the trade. He instilled trust, respect, quality, and satisfaction as the number one priority. Both Dave and Cathy have over 20 years of experience in all phases of professional window cleaning and they keep their prices very affordable. Its been said "the only way you can tell they have been there is the windows are clean".