Here's how to reset a sensor to clear or purge its data to start a new recording:
1.) Open the app to the main screen (the screen with the word "Devices" at the top) and tap the sensor you want to delete.
2.) The next screen will be the time graph. Tap the button in the far, upper right.
3.) The next screen will be the configure screen. Scroll to the bottom and you will find the delete and reset buttons.
4) Tap the "Clear Data" button. You will then have a choice to save the existing data as an archive in the app if you like. Archives show up at the bottom of your device list and can be viewed and exported, but do not accumulate new data. The new data will be saved into a new, clear entry starting at the time of the reset.
We are sometimes asked how to do a "factory" reset of the sensor. There isn't a specific function for this and it is very rarely necessary or beneficial. However, if desired, you can reset the firmware of the device by removing and replacing the battery with these instructions. Please note that with the HT1, you may need to follow these instructions to get the app to recognize it following a battery change.