Leather conditioner for car seats and sofa

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Thanks to everyone who replied.

Sounds like the lesson here is be very careful about the cleaning step.  Conditioner type matters less. 

Currently, I just wipe the seats down with a damp microfiber.  But then I never had something dirty on the seats - I allow riders to drink only water, no coffee, soda, etc on my car.  hock:   That way, no chance of spilling any bad liquids.  After 12 years and 96k miles, so far so good - no cracks of any kind.