You need to use the right quantity of the shampoo as well, and don’t put in extra thinking that will help. It won’t. It will just help you to a huge mess.In hiring them, you should know that the rate they accept on every task depends on the size of the project to be finished. Larger area means higher rate. Still, although a quite expensive service, it will be all worth it.A disadvantage of this method is that you need to have two machines: a floor machine and a wet vacuum cleaner. In addition, you need to be careful and prevent the carpet from over wetting.Actually, there are three inter-related factors at work when you clean carpet. Heat, Dwell Time, and Agitation. To some extent, if you can’t maximise one of them, you can make up for it with the others. In other words, if you can’t get the cleaning solution hot enough, let it “dwell” a bit longer in the carpet, and scrub harder.