Quantified self to bring fast results but not how I expected!

So It's been a while but the smarthome never sleeps (unfortunately I do) and after the purchase of Smartthings 2 hub I have also purchased a Withings Smart Body Analyzer WS-50.

So yes it is a smart thing mainly focused on quantified self but so far I have been much more interested in some of its secondary features: my first CO2 sensor.

First night and placed in our bedroom it showed the levels get progressively worse over the night. A 30 minute opening of the door in the morning restored healthy levels. But now the task to better ventilate during the night.

More on its primary task if it succedes in helping me reduce body fat.