Adjusting Insight to fit your head
If your Insight is not fitting well, you can adjust the headband by warming it with a hairdryer until the plastic becomes more flexible. You can then gently adjust the headband to fit your head. Do not adjust the headband while it is cold. Doing this can cause the plastic to crack.
If the sensors are not making good contact with the scalp, you can also try the above method to adjust the headband and improve the contact quality.