We have a 2017 Volt with the jet black leather inside trim colour. It seems very easy to scuff the inside bottom front of the driver door with one's shoe upon exiting the vehicle. Normal soap and water won't remove these scuffs. I have yet to try something like "Vim", which should do it, but I wonder if its scouring agents would have a nasty effect rather than a cleaning one?? Anyone out there found a good cleaning agent for this problem??