The goal of carpet cleaners everywhere is to get carpet as clean and as dry as possible.
Sometimes this takes what some say are "radical" cleaning methods. After all, complete and effective carpet cleaning is often "custom cleaning" - so there isn't always a 'right' answer available when it comes to the best cleaning method you should use and I use a number of different techniques to resolve all issues.

"External Extraction"  My method of choice for residential cleaning This method is often called "Warm Water Extraction", "Hot Water Extraction" or "Steam Cleaning" and is the cleaning method nearly all carpet manufacturers and carpet fiber producers recommend. This is the only cleaning method classified as "deep cleaning". All the others are considered "light surface or maintenance cleaning" because they are incapable of removing soil deep in the pile. Also, all other methods leave large amounts of cleaning agent in the carpet after cleaning. The maintenance brochure published by the world's largest carpet manufacturer, Shaw Industries, recommends this method, because its own research indicates that it provides the best capability for cleaning.

This method is frequently called "steam" cleaning due to the fine spray of water used to force dirt out of the carpet which is sucked up by the vacuum slot immediately in front of the spray. Seldom is real live steam used, however. This process consists of spraying a solution of water and detergent into the carpet pile and recovering the water and soil with a powerful vacuum into a holding tank. This is done from a truck-mounted unit outside the home with only the hose and floor tool brought inside, or by a portable, system brought into the home or office.

From a health standpoint, the truck-mounted system is preferred because the dirty air and humidity are exhausted outside rather than recirculated around the house. Additionally, truck-mounted systems usually are more powerful than portable units and do a much better cleaning job and get the carpet dry more quickly.

The RotoVac System: I will sometimes use the RotoVac system as opposed to the wand technique if the conditions require a more aggressive cleaning measure.
The Rotovac has two stainless steel cleaning heads which counter-rotate at 250 r.p.m. Each cleaning head has three solution jets and three vacuum slots. This produces 1500 multi-directional cleaning passes per minute.  With its intensive, aggressive cleaning action, the Rotovac restores heavily soiled carpets and matted traffic areas with ease.

BONNET CLEANING

Commercial applications

What Is Its Proper Place?

Bonnet cleaning, also called spin pad or absorbent pad or carbonated shampoo cleaning, is simply an adaptation of hard floor spray buffing to carpets. Even though it is not true "dry cleaning", many people using this system call it dry cleaning, which is highly deceptive.

There are two methods of application of the cleaning solution:

A round absorbent bonnet is prepared before actual cleaning by either immersing it with water and wringing it out so it isn’t dripping wet and heavily soiled areas are directly sprayed with the bonnet cleaning solution at no more than 200 square feet per gallon.  The rotating absorbent bonnet (usually cotton or rayon) is then attached to a low speed (175 RPM) rotary floor machine with a heavy-duty motor because of the high friction involved. A special drive block is required to keep the bonnet or pad from slipping off. Dirt is theoretically collected into the pad. The bonnet is supposed to be changed or turned when the pad surface stops absorbing soil - this is usually up to 600 square feet per bonnet side. The bonnet is then washed out and reused as needed. Sometimes, carbonated water is used to (in theory) give better soil suspension and bring down the pH. Nearly all carpet and fiber manufacturers recommend against using the bonnet method on cut-pile carpet. Additionally, many of the detergents and shampoos for bonnet cleaning contain high levels of optical brightener. The advantages of the bonnet cleaning method are: low equipment cost, rapid drying (usually dry in 30 minutes), very rapid cleaning (because you’re only cleaning the surface), less wicking, lower investment, and the ability to charge less because it’s quicker.

I will evaluate your carpet and choose the best solution for your cleaning !!!