Oil and grease stains on floors with surface area or penetrating finishes very easily stop working when exposed to trisodium phosphate (TSP). Don protective gloves and safety Eyeglasses, and dilute two tablespoons of TSP in 1 gallon of warm h2o in a significant bucket. Update - 2 several years afterwards http://southlake-carpet-cleaning28406.onesmablog.com/5-Simple-Techniques-For-Carpet-cleaning-southlake-49681361