If you cleaned the windows the image wouldn't have been nearly so interesting - think of it as your contribution ot the arts in these days of government cut backs ;-)
Thanks you all for yor comments, and particularly for the encouragement not to clean - I do feel that I should point out that not all of the windows in my house look like this! @northy@alyson@inspiredbyu
@islawight No, I think that it is just a cast 'skin' so the real Incey is probably still in there - but bigger now!