Communication is very important in our everyday life. There are limitless types of communications, including those among humans, between the present and the past, among countries, and between humans and nature.Regardless of times and locations, humans are destined to making communication with the matters that surround us. A window, normally called a viewing window, is for the communication between the residential space and the outer space. It is certainly a medium for the communication between the nature and us.Through a viewing window, we can see snows falling, rains dropping, winds blowing and forests waving in the nature. Through a viewing window, we can also see husbands coming home and kids playing in the playground.When viewing windows gets blurred, so does my mind.When they are clear, so is my mind.Excleaner is always in pursuit of clear communication with the nature.Excleaner is the window for the communication with the nature.