For heavier traffic areas, it is recommended to go over the area 5 – 7 times. For less traveled areas, it is recommended to go over it 3 – 4 times. To get the best possible results, be sure to vacuum the area slowly and go from side to side. Occasionally change direction to help stand the pile upright and reduce matting.
If you really want to be sure you are getting all the dirt from an area in your carpet, a BISSELL vacuum with the Dirt Sensor is recommended.