Final Answer keeps your carpet looking like new with no residue to cause rapid resoiling. Compared to other national brand carpet cleaners, Final Answer is more versatile, safer, and easier to use. It can be used directly on your carpet or in your personal cleaning machine as your cleaning solution. Final Answer cleans quickly without leaving any residue. Odorless. Safe-to-use. Nonflammable. leaves no residue. Colorless. Final Answer has earned the Seal Of Approval from the Carpet And Rug Institute. Use in any carpet extraction machine - including rental machines.