Once you have activated it and you can see the mist coming...

Once you have activated it and you can see the mist coming out... the device will vibrate for 5 seconds and pulse for 1 second... when it pulses (stops vibrating) that is your chance to move the device somewhere else and get a different part of the head ... after 45 seconds - 1 min it will turn itself off so you get roughly 9-12 pulses or 9-12 opportunities to move the device around to different parts of your head.