Had the same problem, my panels are fixed mount and nearly flat. Fortunately there wasn't much of the stuff here in Chicago in the City proper, and this yellow disc came up in the sky and took care of it for now. If it snows heavy and sticks, I ususally brush or remove most of it, I don't scrape the panels, and then if that disc should happen to make an appearance it usually takes care of the rest within a day or so. Rich Hagen