Why use Window Smiths over other window cleaning companies? Some of our customers will tell you it's the quality of the work our window cleaners provide, or our outstanding work ethic. Others will say it's our personable customer service and our vast level of experience. Another reason is our work is 100% guaranteed. It's extremely important to us that you're completely satisfied with our service. That's why we back all our work with this 100% Guarantee: "If you're not fully satisfied with any one of our services, we will go back and redo anything you're not satisfied with - Guaranteed!"