You invented Dura-Clear windows that never need washing! Nothing sticks to them not pollution, pollen, dirt, dust, bird droppings, fingerprints, nothing. Youve invested all your own savings, your parents savings, and some of your friends savings as well into the R&D, production, and start-up of your business. Its been three years since you started selling your windows primarily to single-family homeowners, but now apartment building contractors across the nation have been requesting your windows. I need a better answer then the ones given