I'm in the window business so I see a lot of foggy glass. Once your glass has failed it's too late, but can foggy glass be prevented?
The key to reducing the chances of a failed foggy glass window is shade.
How does shade help to prevent foggy window failures?
Foggy glass occurs when condensation builds inside windows as the air between the panes cools and heats throughout the cycle of day and night. Windows that accumulate more heat throughout the day are more likely to fail faster.
If your windows are unshaded or sun struck, we recommend solar screens rather than window films. Solar screens block up to 90% of the sun's energy, and, because they don't rest against your window, the heat is dissipated harmlessly into the air. Read more about why we choose solar screens over window films here.
LPT: reduce the chances of foggy glass by shading your windows.
Shameless plug: call and ask for me (Rick Middleton) for a free estimate and 30% savings on solar screens (512-358-1560) with no minimum purchase requirements.