Machine Types

There are 2 principle types of carpet cleaner the public can use, Upright and Wand cleaners. Here's an explanation of how both work - each can do a good job depending how you approach the job in hand.
How upright cleaners work:

Upright machines are less flexible than wands. You can't get underneath furniture because they don't bend and the size reduces mobility, meaning you are almost forced to clean in a methodical way. They also work in one direction only and as it's easier to pull than push pick a machine that moves backwards or one that is self propelled. All uprights come with a hand tool for cleaning spots or getting underneath furniture so you will be able to clean everything with the tools you're provided with. You can also use this for cleaning suites.

How wand Cleaners Work:

Wand machines work by putting water mixed with soap on the carpet and sucking it up through a closely positioned vacuum. They only suck up if you move backwards and therefore if you move the wand forwards you put more liquid on the carpet than perhaps you want. However, this has a direct relationship to how dirty you feel the carpet is, you'll clearly go forward and back more over a heavily soiled area than you will a relatively clean area.

Hand Tools are very similar to wands....Here's an Example.

The handle is to add liquid. Simply squeeze and the mix will come out the spray nozzle. The spray head should give an even wide spray. If this doesn't happen there could be dirt in the spray line.
The tool needs to be attached to the liquid source. The connector should be water sealed to stop leaks. The vacuum head is in front of the spray so activates when drawn backwards, in the same way as a wand in the above example.
Cleaning Home Steps to Follow Stain Removal Methods to Use Walkways
Machine Spares
Complete spares for:
Hagerty Puzzi 100 Carpet MinderMachines
Stain Guarding
Simply Spray to Protect Your Carpets, Suites - Even Raincoats. 
Stain Treatments
Simple to Use 
for Tea, Wine, Glue Rust + Many More

Buy 1 Get Another Half PriceScotch Guard

water repellant spray -  to protect all your Suites, Raincoats, Shoes, Bags & Carpets
Odour Treatments
get rid of nasty smells, sanitise & clean
Curtain Cleaning Service with Full take-Down & Re-Hang NO SHRINKAGE GUARANTEE
Stain Removal Kit
For Blood, Egg, Coke, Wine, Beer and more...
Leather Cleaners
Professional Kit to Clean & Condition Your Leather