I have had a side fringe for a while and it has been reasonably accommodating of my cowlick, but I recently changed it to a heavy, blunt cut fringe. I love it, and it suits me, but I cannot get it to sit straight no matter what I do.
I have BBH'd it, used straighteners, tried the Sali Hughes back and forth method (had most success with this), but even using my teenaged ds' 'freeze hold' hairspray, after a few hours the wave comes back and I end up pinning back the fringe in frustration.
I noticed this morning that I had written in my diary, in capital letters STOP CUTTING IN A FRINGE - now I remember why 
Before I give up completely, is there anything else I can try?