Foobot device is not made for being plugged and unplugged in too short time interval.
Indeed, when Foobot is unplugged and plugged in again, it resets its heating and calibration process. Thus, within the first hour there’s too little data to be realistic. Please wait at least 3 hours to get correct data.
In order to have your device running properly, you need up to 6 days with Foobot powered on the first time you use it.