If you haven't bought it yet, get the Bissell Big Green deep cleaner. A far superior unit. I have rented a ton of rug doctors and finally after renting a Bissell I bought it. For home interior use it cleans forward and backward with a rotating brush instead of an agitator bar like the Rug Doctor. Removable solution tank for filling and cleaning, the Rug Doctor is built in. The hand held attachments I found easier to hook up as well. I am going on year number three with mine and it sees about monthly use in the home due to 3 German Shepherd/Dutch Shepherd dogs. It extracts and dries the carpet significantly faster than the Rug Doctor as well.