Love the look, but are the shoes gapping as much around your ankles as they appear?
A quality suede shampoo will work to emulsify the oil and lift it from the suede without softening the color. Get some on the leather sole, wash the entire ring and bottom, probably treat the inner shoe also - follow the instructions on the bottle.
Cheap route would be to use some type of dawn dish soap (no odor or color). When it is dry you will really need to treat the suede with a moisturizer - brush it - and use nano tech to finish. Then always tree that pair after every use.
Does anyone has idea on killing the mold on the shoes?
I found out my #8 LWB has mold (the second time.....) on the tip and the punch holes.
I use shoe trees and I let the shoes air out a couple of days before putting them in the closet.
The first time I found the mold, I wiped off the mold and brush the hell out, after several months, it comes again......