Like John said, we use our vapor cleaner and a cotton or micro towel on the steam head, works great. We have done a lot of leather furniture this way. We don't do Nubuck or suede leather only aniline and semi aniline. It leaves the leather clean and soft.
Jim England
smart-cleaning-solution.com
sanicleansystems.com
sanisteam-usa.com
illaminate.com