• Apply soapy water or lots of water to bottom of shoes and rinse.
• Use a leather cleaning product to remove oil from the rest. A search of google for leather care and oil removal brought up many products that would appear to work.

I probably would just use some of that orange cleaner that I have because I watched too much TV one night and then apply a leather conditioner or lotion since I have this handy. Remember to wash your hands really well with dawn or some other soap or wear rubber gloves.