I have a west facing window that seems to be emanating a horrible body odor smell. I've isolated it to the window, since I can close the cellular shades and it limits the smell. Additionally, if I stick my nose into a crack between the shade and the window frame, the smell is particularly strong.
It's also stronger in the late afternoon when the sun is beating directly on the window.
I've tried cleaning the area thoroughly, but that didn't help.
What could be causing this? How can I fix it?