But I feel the cleaner is absorbed by the leather, and using just a damp rag afterwards only removes the top layer of the soap, not what has been absorbed. However, I feel that light brushing while wetting the leather removes every bit of dirt and soap. Nevertheless, water is still not good for the leather, and I'm quite certain I strain it more than I should with my method.
Unless you are trying to strip off a substantial amount of old polish why use any product for cleaning? A good brushing and sometimes a damp rag is usually all that is required. Sure if they are exceptionally dirty or stained a cleaner might be required, but if you maintain them that should be a rarity.