Leave it on the cow!
Remember that most late model car leathers have a clear protective coating on them, so that's what you're cleaning and conditioning.
I've been using the Autoglym leather balm twice a year, Spring and Fall. Seems to work fine as I haven't had a requirement for any major cleaning or stain removal.
Ford sells a cleaner and a sealer for their leather. Motorcraft ZC-59 is the sealer; ZC-56 is the cleaner.