What is the best product to use?
Lexol leather cleaner works well. Available at better hardware stores and furniture stores.
Saddle soap is a great product that I use to clean and condition leather.
Hometalks How to Clean Your Leather Couch link might be informative. I hope it helps address ypur concerns.
Hi Renee. I'm Cindy. Begin by vacuuming your sofa with the brush attachment on your vacuum cleaner. Then mix equal parts of water and white vinegar. Dip a microfiber cloth in this solution and wring it out so that it is damp. Wipe the entire sofa with this cloth while rinsing it often. Dry the sofa with a dry cloth. Be careful when using saddle soap. It can dissolve the leather over a period of time. Also do not expose your leather sofa to direct sunlight. It can age and dry the leather. Wishing you well.