To repair fogged double-pane glass windows, you need to address the seal failure. A professional will drill small holes in the window to allow the moisture to escape, then replace the seals and refill the space between the panes with argon gas. This process restores the insulation properties and clears the foggy appearance. Replacing the entire window may be necessary for severe cases.

Fogged double-pane glass windows are repaired by addressing seal failure, drilling holes to release moisture, and replacing seals. For severe cases, full window replacement may be required.