When the seal on a double-pane (or Insulated Glass Unit - IGU) window fails, moisture gets trapped between the panes. This results in fog, condensation, or a hazy appearance that cannot be wiped away. It also reduces the window's energy efficiency (R-value).
These references provide a range of information on double pane windows, including safety standards, product specifications, and guidelines for installation and maintenance. They can be useful resources for anyone looking to learn more about double pane windows and how to fix a double pane window seal. how to fix a double pane window seal