How do you clean the iphone 5s leather case?

I have the leather case that was released along with the iPhone 5s and I was wondering if anybody knew how to get rid of marks that are on it. It hasn't even been a week yet and there already scuff marks all along the edges and corners. Does anybody know how to safely buff them out?

I have tried using toothpaste like one website suggested but it was ineffective. I really like the feel and the fit of the case so I'd like to keep it for a long time if possible.