Anyone use one? Do they work well? How far below zero are they effective? We're going to get our first real winter storm on Sunday, and then it's supposed to be highs in the single digits and lows in double digits below zero for the next week with more precip possible. So I'm going to have to make sure nothing freezes to the dish. I was also thinking as a cheap alternative to the hot shot using a roof deicing cable and epoxying it in a spiral to the back of the dish like I did long ago with my 18" dish in NJ (we never got deep freezes like this there). Anyone ever do something like this with a slimline? (The dish is still metal, right? I haven't been up to look at it since it was installed - I don't want to melt it or anything!) Is the 5 LNB still prone to freezing up like the singles were?