so far we have cleaned 2 rooms of carpet using this cleaner and no other stain removers etc. it cleaned grease, oil, and wd-40 out of my exercise room carpet and the other room is where my husband does his woodworking, painting, etc and our sugar glider lives in her 10x10 mesh tent. that carpet had a trail between the workbench and her tent that I did not think would come clean, in fact I had given up worrying about it and was just thinking of replacing the carpet when we got around to repainting that room, but I was wrong. my Bissell machine and this cleaner absolutely cleaned it like new. my husband was so impressed as was I.