Originally Posted by
jerry305
The windows do not form a perfect seal. The pressure for a seal required at 35000 feet is different than at ground.
In very very very cold temperatures, it's possible for deicing fluid to enter a plane window. I could see that a bug could get in in certain conditions.
Originally Posted by
CLTmech
As long as the window assembly was correctly installed fluids should not get past the seal, and if some does, it shouldn't get to the inside of the window itself. Any moisture in the window itself should only be from condensation (cabin humidity and inside/outside temperature).
On the tarmac one morning, in -35 degree conditions, a stream of orange deicing fluid began dripping from the window onto the window seat passenger in my row. The fluid scared the passenger, and the fact that fluid could get into the plane scared everybody else within about 3 rows of him.
Perhaps this is a mystery that could be solved in another forum.