Mix 16 oz. of Namco's Magnum Blue Pre-Treatment in 5 gallons of hot water, hook up Namco's Spray Gun, then mix Magnum Blue with sprayer down inside bucket of water. Spray entire area to be cleaned holding spray gun 1" to 4" above carpets, blasting away dirty stains by holding gun directly above stain. Magnum Blue should eliminate tar, oil, traffic areas and urine stains and brown stains. Magnum Blue will fluff up the carpets. Note: Make sure that area is well ventilated and a chemical spray mask is worn.