That gas is the key. It slows heat transfer, keeping your home warmer in winter and cooler in summer.
You are comfortable removing window stops, measuring accurately to the millimeter, and reinstalling a new IGU. This is doable for wood or vinyl windows with removable stops. double pane glass repair
Your most cost-effective, energy-smart move is to call a local glass shop, not a big-box replacement company. Ask for an in your existing frame. You'll save hundreds of dollars per window and keep your original trim intact. That gas is the key
When the sun hits the window, the air inside expands and pushes moisture out through the micro-cracks. When the window cools down at night, it draws moist air back in. Over time, this moisture gets trapped, condenses, and creates the fog or haze you see. This is doable for wood or vinyl windows
Unfortunately, nothing lasts forever. Over time, the expansion and contraction of the glass due to temperature changes can cause the seal to weaken and eventually crack. Once that seal is breached, ambient air enters the space.