We love New Jersey. In fact, GEM is owned by life-long New Jersey residents. We are emotionally invested in beautifying our hometowns and surrounding neighborhoods. This affects the way we go about doing business and the methods that we employ. We take the environment into consideration and use non-toxic, environmentally friendly, and biodegradable cleaning products that are safe for your home and family. These are the very same products that we use to clean our own homes. GEM Window Cleaning takes pride in doing quality work and providing top-notch service. We will work hard for your repeat business and your referrals. This is what has made us the industry leader in the Princeton, NJ area. All of our work is backed by a 100% customer satisfaction guarantee. We are not satisfied unless you are!