Go over to Menard's or one of their hardware competitors, and consider one of the following: RAIN-X, which is normally used to help keep automobile windshields clear of rain---it also doubles as fairly effective in keeping snow from accumulating on satellite antennas.
Another thing to consider is automotive wax----coat the antenna so that snow does not stick to it.
Do this on a day when it is above freezing, as working at current temperatures may not allow either to be properly applied.