Family homes and the traffic lane problem
In most Allen homes the carpet is not uniformly dirty. There is a dark path from the garage door through the kitchen to the family room, a worn line up the stairs and clean carpet everywhere else. That traffic lane soil is abrasive, and left in place it cuts the carpet fibers and causes permanent wear that cleaning cannot undo later. Cleaning on a schedule and protecting the lanes is the difference between carpet that lasts ten years and carpet that looks tired at five.
