Getting the Stains off the Glass

Water and a wet rag took the window from this:

to this:

The principle at work is to start mild and then use increasingly heavier cleaners only as needed.  I really wanted to see what wonders the #0000 steel wool would do to it, but we don't have time for me to be picky.  It does look better than it did, anyway, and that's good enough for now.