The hoistway is the hole in which the elevator cab runs through. Equipment such as wires and control boxes lie in this space. The hoistway could look very different in each elevator shaft, depending on its design. At the end of the day, this is where most dust and trash builds up. Day to day activities bring dirt into the door track and sills. Clean door sills are crucial for the correct function of the elevator doors. If there is construction in a building, the dust particles will find their way into the hoistway and collect on the beams and equipment. Regular cleaning of the hoistway is important to maintain a clean and safe elevator unit not only for technicians but for regular passengers.