When the seal around the glass in a double pane window becomes compromised it can allow moister to become trapped in between the panes leading to unsightly condensation. In some situations the window may need to be replace but in other situations having a professional replace only the part of the window collecting moister may be a less expensive option. Some people have suggested drilling a hole in one pane to allow the moisture to evaporate as a the most cost effective option. However, this option may decrease the insulation properties of a double pane window.
Read more: Comment on Problem with Moisture Trapped Between Glass on Windows – Today’s Homeowner by Thomas Boni