Since the LNB does not point "up" into falling snow or ice it is likely to NOT need cleaning. Also, the LNB receives a focused beam from the satellite (bounced back from the parabolic dish) so spraying it might make that signal fuzzy (imagine spraying a chemical on your glasses). ...I am no expert here but it is something to consider.
One other thing: the dish and the LNBs must maintain critical alignment to the satellite in order to get a proper signal from all the satellites. ...so be gentle!
Actually, I hope someone here will respond who has used one of those strap-on dish heaters. ...on their dish, that is For those of us who, like the thread starter, have an inaccessible dish up on the roof climbing up to clean the dish in a snowstorm is just not practical.
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