• avoiding dirty windows will assist in preventing window damage, protect indoor air quality and maintain your energy efficiency levels. 

• Windows clear of hard water oxidation and debris will allow maximum natural light to filter through, illuminating the space behind them. Studies show a room with a maximum amount of natural lighting feels more inviting and relaxing for homes. As for businesses studies have shown the same as homes, but with added increased productivity as well as higher employee satisfaction rates. 

• In 1982 social scientists James Q. Wilson and George Kelling introduced the broken windows theory. Once discussed and studied, the following per Wikipedia was the results. 

Social psychologists and police officers tend to agree that if a window in a building is broken and is left unrepaired, all the rest of the windows will soon be broken. This is as true in nice neighborhoods as in rundown ones. Window-breaking does not necessarily occur on a large scale because some areas are inhabited by determined window-breakers whereas others are populated by window-lovers; rather, one un-repaired broken window is a signal that no one cares, and so breaking more windows costs nothing. 

credit for the above article goes to Wikipedia at the following link https://en.wikipedia.org/wiki/Broken_windows_theory

It is believed by many, the same concept can be linked to dirty or unclean windows. like broken windows, unclean/unmaintained windows will give off similar responses. Just as in the case of broken windows, this shows a lack of pride for your homs or business, giving off the false impression that you don't care, so why should someone who strives to cause havoc care for you.

• what do your  customers think? well we can only answer for ourselves, so let me walk you through the looking glass and place the decision in your hands. Imagine walking up to a new restaurant, massage parlor, barber shop, tattoo shop or coffee shop. Now imagine the first thing that catches your eye is a row of dirty windows, with the thought in mind,  the part of the business that you  can readily see, is unclean. what does the part of the business you can't see look like? are you eating at an unclean restaurant, how about letting a tattoo artist work on you with unclean tools. How about drinking that caramel iced coffee only to discover there is a bug frozen in the ice. (true story.) Again if the part of the business you can see, is unclean, what do the other parts look like?