I have a 2008 Holiday Rambler Admiral. The Driver side window is foggy and need to replace the glass in the sliding window. I cant seem to find a way to remove the window. The tag below the window says atwood mobility products. I've tried moving the window up down and to the side but cant seem to find a way to remove it to take to a glass dealer. I prefer not to have to buy the whole new window. Any help appreciated.