I finally wore my Walnut Strands for the first time today. They are lovely . Just have two small questions: 1. There seems to be a very small crease. I'm just wondering, what to do to prevent creases? I don't know if I did anything wrong and I wouldn't want them to get worse. I've kept them in shoe trees and also used a driver's license to slip them on and off. 2. On what surfaces are the leather soles less preferable?