Not sure what is going on Hazel, he is flying up and down the window.
I am sure they have nests galore out back (there are hundreds of birds and lots of trees.
We had a cardinal who did the same thing, although he also would sit on the window and look in, this robin just flies up and down the window.
Will see what we can do with the soap tomorrow. The view is disgusting right now as the window is so dirty (he did this in just 2 days) I am ready to ring his neck.