One carpet cleaning product that I've personally used and had great results with is the Rug Doctor. Its my go to when getting rid of touch stains like wine, coffee, pet odors. What impressed me the most is how fast it cleaned the carpet It doesn't require any spraying or scrubbing beforehand. It is fairly cheap to rent and its convenient when you don't have the space to store rug cleaners. Overall, I recommend the the Rug Doc as an inexpensive way to clean carpets.