The bad news first: You cannot "repair" the fog. That milky film between the panes is condensation from humid air that has infiltrated the failed seal. No amount of DIY drilling, chemical drying agents, or defogging kits will restore the window’s original insulating power. At best, they offer a temporary cosmetic fix; at worst, they can crack the glass.
So, what are your real options?
If your double pane window is foggy, accept this truth: Don’t waste money on aerosol sprays or magical repair kits. Call a local glass shop to measure for a replacement IGU. It costs a fraction of a new window and fixes the problem correctly. A clear, dry window is not just about looks—it’s about getting the energy efficiency you originally paid for.
Double pane windows are a marvel of modern efficiency. Two sheets of glass, separated by a spacer and filled with an inert gas like argon, work together to keep your home warm in winter and cool in summer. But when that perfect seal fails, the magic vanishes, replaced by a cloudy, foggy eyesore that won’t wipe clean.
Measure your chest (A) and hips (B) following our indications.
The reference measurement will always be the larger of the two (A or B).
Look in the chart to which size corresponds to that measurement.
| Size | Reference measurements | |
|---|---|---|
| Inches | Centimeters | |
| 2XS | 25.6 – 29.4 | 65 – 74 |
| XS | 29.5 – 32.6 | 75 – 82 |
| S | 32.7 – 36.1 | 83 – 91 |
| M | 36.2 – 39.7 | 92 – 100 |
| L | 39.8 – 42.8 | 101 – 108 |
| XL | 42.9 – 46.3 | 109 – 117 |
| 2XL | 46.4 – 49.9 | 118 – 126 |
| 3XL | 50 – 53 | 127 – 134 |
| 4XL | 53.1 – 55.9 | 135 – 142 |