(7) Every bag and filter vacuum has thousands of tiny holes in it. If it didn't, the bag in the vacuum would blow up when it is filled with the air that is being sucked in by the vacuum motor.                         
(8) Once these holes are plugged, the vacuum loses what is called air flow. All bag and filter vacuums need the air to flow through the holes in order for there to be air flow.                                                                                                     It is actually the air that is flowing through the holes in the bag and filters that pulls the dirt and filth off of the carpeting and furniture. It is not suction that accomplishes this task. 
(9) You need air flow in order to clean. Have you ever noticed that after you have been cleaning for a short period of time that the vacuum cannot pick up a simple string or paper clip off of the carpeting? 
(10) Vacuum cleaners force out millions of toxic particles of filth and bacteria into the air via the holes in the bag or filter. These particles remain in the air for up to twelve hours and then they fall down on to your furniture, carpeting, and bedding. During this period of time, the person who is cleaning and other family members are breathing this toxic bacteria into their lungs.
(11) After the ten minute period of polluting the air, larger particles of filth and dirt begin to clog the holes of the bag or filter because they are to big to pass through the holes. The vacuum loses air flow and stops cleaning. We then find that the beater bar spins on the carpeting, separates the carpet fibers, and the dirt falls in between those fibers and is buried deep into our carpeting.