See the Difference. Crystal Clean --The Window Cleaning Professionals is a professional window cleaning company serving all of Central Iowa for 15 years. Crystal Clean provides all types of window cleaning and related services, including: commercial window cleaning (including high-rise), residential window cleaning, and new construction window cleaning throughout Central Iowa, SPRAT Certified for rope access work (Des Moines, West Des Moines, Clive, Urbandale, Windsor Heights, Waukee, Pleasant Hill, Grimes, Ankeny, Ames, Altoona, Huxley, Nevada, Story City, Boone, and more. We now do dryer air duct cleaning as well. If you have windows in need of cleaning call us today!