Appreciate the replies.
Must have been having a geezer moment when writing the above post.
As the screens are on the inside.
When I checked to see if suggestions would work, I remembered spraying the inside of the glass, thru the screen, with Windex. Then rinsing with clear water spray. About all that accomplished was getting inside stuff wet, in spite of using a tower to catch dripping.
Certainly looks like the screws inside will need to be removed and the window separated enough to get the screen out. Most likely resulting in leaks
when put back together.
Actually beginning to like the look of the window. Thinking of it more
in the arena of "Smoke Colored" rather than dirty.
Some things really don't need fixin!