Have a 2013 c-max , drove it last winter with no issues, this year we have had about the same weather, but noticed this morning that the lower shutters were opening and closing with a a lot of noise, and upper shutters were covered in ice and would not open at all. I pulled into my garage and sprayed hot water on the shutters to remove the ice. That seemed to cure the problem...will monitor. Any one else had this issue? thanks..