Has anyone experienced their rear defroster / defogger turns off before the frost has been removed? The manual states that it'll run for about 10 mins, then turn off on its own. If you turn it on again, it says it will stay on for only 5 mins. I've timed mine and it only stays on for 6 mins the FIRST time and 3 mins afterwards. Does anyone know if their is a TSB or a way to keep the rear defroster on for longer? Wish they would leave me to control that function, not the computer. Rrr. Very frustrating on the cold days (Ya Canada) when I can't see out the back.