The bonnet and carbonated water method of carpet cleaning uses a pretreat solution of cleaning agents then a rotary tool is used to scrub the stain At the bottom of the rotary tool is a bonnet or pad if you will that transfers the dirt from your carpet to the bonnet You may have heard of such companies as Chem Dry that offers this method Sort of the methods used by housewives where they use club soda on a stain and then a clean white clothe to soak up the stain by blotting it This method works much better than just shampooing the carpet Using shampoo involves spreading carpet shampoo on the stains and scrubbing it in with a brush The shampoo s can be in dry powder form foam spray or even liquid After the shampoo has dried it is then vacuumed up with a vacuum cleaner This method of carpet cleaning works for quick fixes but mainly just pushes the dirt further into the carpet