No just spray the PAN part! Snow will slide off but may get stricky
later and require scrubbing.
heavy wet snow tends to do this one a year at most here.
you can add some heat tape, to keep it clean at bad weather times. tape
gets stuck to back of pan, and they have grids that are designed
specially for this.
dont bother with the dish covers, they are a big waste of money and a
garbage bag is as useful, and costs little.which doesnt do much...
i used to be a dish dealer installer