I just thought I would pass this along in case anyone is interested in reading it.
http://www.hotlib.com/articles/show.php?t=The_Care_and_Feeding_of_Your_Clear_Vinyl_Boat_Windows
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Edited 11/16/06
Since the above link doesn't seem to work for everyone based on the comments below, here is a different link directly to the authors web site. http://www.boatdocs1.com/Clear-Vinyl-Windows.html It contains the same information referenced above. I would also suggest you look around his site since there is a lot of other information on boat detailing and maintenance as well.
http://www.hotlib.com/articles/show.php?t=The_Care_and_Feeding_of_Your_Clear_Vinyl_Boat_Windows
......................................................
Edited 11/16/06
Since the above link doesn't seem to work for everyone based on the comments below, here is a different link directly to the authors web site. http://www.boatdocs1.com/Clear-Vinyl-Windows.html It contains the same information referenced above. I would also suggest you look around his site since there is a lot of other information on boat detailing and maintenance as well.