You're standing by your window admiring the view. Then you notice it. Moisture has built-up around the edges of the glass. Should you worry?
It all depends on the reason for the build up.
Assuming you have traditional double-pane glass in your windows, there are a few things to look for if you notice moisture.
Often, moisture at the bottom of the windows is simply caused by too much humidity in your indoor air. If that's the case, simply adjust your humidifier.