We have purchased a house where the previous owner decided to sell "mid-renovation". One of the projects left unfinished for quite some time was the painting of virtually all the windows. He painted many of the windows and neglected to sc**** them at all. Now there are thick strokes of paint on the glass panes and they have baked on over a long time. It took over an hour to remove the paint off of one window with a razor blade, and there are several dozen. Any advice on how to do it easier? Chemicals or other tricks?