Similar to the third version of the Personal Cleansing, it is done thus:
Clean, sweep, vacuum, or otherwise clean the place as if it were Spring-Cleaning. Light the smudge and, starting in the center of the area, fan the smoke toward the compass points. Nothing special needs to be said, but you can if you wish. The image to be held in the mind is of a fog or smog choked area. See the fog retreating before the smudge smoke, leaving pure air in it’s wake. Move clockwise around the area fanning the smoke and leaving the pure air in it’s wake. See the trash leaving through any physical barriers in the way and see them as pure in the smoke’s wake. When you have reached the limit of the area to be cleansed, erect a shield (bubble-shaped) over the entire area to prevent any of the negativity from reentering.
Stars light your path.