The very best cleaning solutions that can be used on leather furniture are cleaning solutions specifically designed for leather materials to begin with. These kinds of cleaning solutions are not only going to remove dirt, debris, and much anything else that can attach itself to leather, but they will also work to penetrate deeper into the layers of leather beneath the surface to create a much softer, much more supple overall leather material. Always follow the tags on the furniture and spot test any new products/applications on a small area before apply to the rest of the furniture. Always look for leather cleaning solutions that provide some kind of conditioner for the leather material itself to avoid drying them out, especially if you are using more “high-powered” cleaning materials.