A bit of experimenting is called for Peter. Let Caroline take it out by herself and see if the problem is still there. If it not, it must be down to you as driver. The next step is to get a number 1 haircut and see if that improves things!
I think styling wax to hold a more aerodynamic shape would be more effective.
maybe a ski mask or even a cut off pantyhose, pulled above your head to press the hair close to the head may do the job as well, and you do not need to wash your hair after the test drive. But you should avoid parking near a bank while dressed up this way ...
2015 4/4 "Chaplin" in black and white, usually strolling around at the german north sea shore
