If your Glow humidifier's sensor stays below 40% or keeps misting nonstop in Auto Mode, it may be due to the room being too large or having very dry airflow (like from an open door or drafty window).
Glow’s Auto Mode aims for 40%–80% humidity, but in large or drafty rooms, moisture escapes faster than the device can add it. The sensor never detects reaching 40%, so the humidifier keeps misting.
If Glow can't raise the humidity enough, switch to Manual Mode for better control.