Often caused by failing exterior caulking or weatherstripping rather than the IGU itself. How to Repair Foggy Windows (Seal Failure)
Leo nodded miserably.
"You don't," the landlord said. "You call a glazier. You pay four hundred dollars. Or you replace the whole sash. But you never, ever try to repair it yourself." how to repair double pane window
The email from the landlord had the subject line: Below it, just three words: Don't. Just don't. clear off that workbench
If the frame is solid, ordering a replacement IGU is a very achievable DIY project that can save you hundreds of dollars compared to a full window replacement. Grab your tape measure, clear off that workbench, and enjoy the clear view again! and enjoy the clear view again!