Not only does it ruin your outside view, but dirty glass looks unsightly ... after spending countless hours window cleaning, well — you’re probably making these window cleaning mistakes.

They posted a photo of the offending sign on the subreddit r/mildlyinfuriating, where they wrote, "It's so bright it lights up my livingroom and ruins the view of an otherwise beautiful street.

The real reason you can't see stars outside the window on a plane has been revealed ... lights of the cabin which can tarnish your view of the twinkling night sky, says theoretical astrophysicist ...