When you turn off the TV at night, you have your Firestick plugged in the TV all night, thinking that it's safe. Let me tell you that it is not safe because your Firestick still has the voltage from the power supply. In this case, the chances of your Firestick getting damaged are very high due to the unregulated voltage at night sometimes. And If suddenly voltage increases, it may damage internal parts of the Firestick, and you may have permanent damage to your Firestick. So, It is highly recommended that you eject your Firestick from the TV every night.