Thinka can be factory reset by pressing the top button of the device with the Thinka logo.
Press and hold the button until the led flashes orange, releasing it and hold the button again until the LED flashes purple. When the led stopped flashing you can release the button. Your Thinka has been reset to the factory defaults.
Only do this if you absolutely need to, for instance if you are moving or selling your Thinka
Make sure to make a backup, this will help you set up your Thinka again