I have a Withings Scale that measures CO2 levels. During the night, it goes up to 1600ppm. It used to go over 2000, but now we leave the door half open. I can'

I have a Withings Scale that measures CO2 levels. During the night, it goes up to 1600ppm. It used to go over 2000, but now we leave the door half open. I can't sleep with a window open most of the year. In winter it's too cold, in summer it's too hot.