Another Helmet Hair story
(San Diego County, CA)
My first trick for helmet hair is that I got a cooler bike! LOL! In all seriousness though, I have very fine, and now curly hair which is completely unruly withOUT a helmet! I've tried all lengths, longer is better. And I love my hat! Sunglasses on the head are also an option since they sit right where that flat spot is and hide it.
On the days I actually care, I have a small pen sized spray bottle from Sally Beauty Supply (or any beauty supply store, I'd hope) and put 2 or 3 drops of conditioner in it with water (from experience, distilled water is best to help keep the sprayer from clogging up from minerals in the water). Leave-in conditioner is good, but lately, I use WEN Tea Tree because I like the minty cool feeling.
Bottom line for me is now that I ride all the time, I really don't care anymore. Unless I see a knock-out woman with gorgeous hair come flying out of her helmet like the models do (and yes, I've seen it! It's not fair!!). Good luck! Happy riding! And yes, I still wave at other riders!