A little bit of window cleaner should clear that stain up in no time. :)
An interesting look in your photo, Rob. A nice soft look and feel to your photo. The silhouette on the bottom right corner could be pared back some. Good post-photo work.
Think about the photo before and after, never during. The secret is to take your time. You mustn't go too fast. The subject must forget about you. Then, however, you must be very quick.
Henri Cartier-Bresson