To start the Time to Burn countdown, press the “Track Sun Exposure” button on the homepage. Keep in mind that while your Time To Burn countdown is running, you won’t be able to change information in your profile, your environmental setting, or your location. If you wish to change any of this information, you will have to reset your Time to Burn. You will be given the option to reset by changing any of the above information while your Time to Burn countdown is running.