To hard reset your Whistle 3, you will need to place it on its charging cable with the cable plugged into a computer or an AC Adapter.
Then take a paper clip, and on the charger insert the end of the paper clip into the RESET button located underneath in the center.
You should feel a slight click when the button is depressed, then hold down for about ten seconds.
During this time the LED on the Whistle 3 will turn off, and once we have released the button a few seconds later the light will turn on either Green or Amber.
Your hard reset is now complete! You may remove the Whistle 3 from the charging cable and test to ensure everything is working correctly.