This video shows the process for dry carpet cleaning performed using the Host dry carpet cleaner system. Although there is a small amount of moisture used in the application of pre-sprays it dries rapidly. The Host dry carpet cleaner does remove soil in the carpet but it has some limitations. The biggest problem is the dry sawdust like powder is not fully removed during the cleaning process. I'm a professional carpet cleaner working in Tampa FL and there are some local carpet cleaners who use the Host system for cleaning carpets. Every time a clean a carpet that has been previously cleaned with this dry carpet cleaner I find a lot of their cleaner still embedded in the carpet.
The picture to the right shows what my equipment looks like after I clean a carpet that has been cleaned by a dry carpet cleaner. That sawdust like powder is everywhere. That means it's deep down in the carpet. Even after two cleanings I still find some of their cleaning material on my equipment.
I have reservations about cleaning a carpet with a dry powder that cannot be fully removed during the cleaning process. At Chem-Dry of Tampa FL we use a low moisture carpet cleaner that dries in hours and is extremely effective.
I'm not suggesting that you shouldn't use a dry carpet cleaner but you should be aware that there is something left behind after the cleaning is finished.