We had an oil or some type of fluid transmission stain from when the fire department was in our for something. No matter what we tried, it would come up again and again and again. We called Alpha Carpet Cleaning and they were able to get it out, although it did come back up again. After the second or third time of their application, it was completely gone, and it stayed gone! We never thought it would come out so we were really, really pleased with the results. We will for sure be using them again in the future!