I cleaned the carpet using a 1 to 5 ration of ammonia to water. And it came out really good. I just sprayed it on, scrubbed with a brush, then let it sit for about 4 mins, then sucked it out with my shop vac. Then I rinsed it twice with hot water sprayed on there. Looks so much better!! I should have done this once every three months, and it would stay looking brand new.