Hi, it’s not a simple case of leaving the window open as obviously the alarm will pick up on that and you would expect it to go off.  With the 370, the windows drop automatically when you open the door.  They are then supposed to rise when the door is shut.  I suspect my window sometimes isn’t rising as it should so there’s a small gap and air is getting in which then activated the alarm.  There are a few suggestions on the issue but this wasn’t listed so thought I’d throw it in there so others