Are you talking about the 80s crimper look?
I talked to Jennifer and Erin both about that. Erin does not show shelties, but she shows ACD. She has been around shelties a long time and knows almost as much about them as Jennifer. They said a few things:
1. It can be caused by wet fur not being dried properly. Erin said a good suggestion would be to invest in a dryer if it really, really bothered me.
2. Jennifer said Skipper, her sable merle performance dog, had this problem for a long time. It was caused by being greasy. She said she would give him a bath, and then in a day or two his fur behind his ears would look bad again. She said not to give up hope, because he eventually grew out of it. I am assuming maybe she means he got his adult coat in and maybe the texture of his fur changed. My first sheltie, Gizmo, never had the wonky fur behind his ears. Fluffy doesn't have it as bad, but hers needs improvement, too.
Baby powder does not work for me, either. I had very oily bangs as a teenager, and my mom always told me to put baby powder on it. It didn't work. I might try the cornstarch.
edit:
I not sure if I understood if you were talking about the crimper look or not, but that's what I was talking about above.
