Please forgive me if I already posted this in the spring/summer, but I'm not finding my post so I'll try again.  A year or two ago there was a 1/2 inch crack in the middle bottom of the front window on my 13 ft. Scamp.  Now it's heading up the window and is more like 6 inches long--just a nice straight crack.  Wondering if anyone has experience with this--fixing, or leaving, or replacing the front window?  Thanks!!!