After rinsing, while the hair is wet, use a roto brush AND a regular brush to pull all the hair up, all around the leg. When blowing also blow the hair as straight up as possible. It's OK to "part" the hair in the middle of the leg, as you will when you are pulling the legs with adhesive.
Do this at least once every day, and if you can an additional time, even if it is with dry hair. Do not let a day, and certainly not a few days, go by without brushing that hair. In fact, this goes for all the hair, not just leg hair.
Finally, use a good quality conditioner (e.g., Double Dip) in the leg hair daily.
