To set formula mode to into features, then select formula mode, enable formula mode then set the formula temperature.
Formula temperature is the temperature you will be notified that your kettle has cooled to.
When formula mode is enabled the kettle will boil to 100 degrees then notify you when it has cooled to the formula temperature.
Below is a video explaining how to set formula mode.
Please do not hesitate to get in touch with Smarter Support by emailing us at email@example.com. You can also give us a call us on 0800 802 1237 if you are in the UK or EU or on +1 (855) 489 5522 if you are in the US.