Yeah that automated implementation @piper_davis mentioned is key, it saves so much time over doing all that manual work.

My friend Lisa tried that cool shot trick with her hair dryer last month. She blasted her roots with cold air for like thirty seconds after styling. Her hair had crazy volume that didn't budge even during her commute. She's totally converted now and won't shut up about it. Says it's the best free tip she's ever found online.