I am trying to come up to speed on my new (to me) 2013 Volt. My wife suffers during the winter with cold feet. Of course I purchased the car during the end of the summer when it was impossible to test the heater under real conditions. Now that the first cold snap has hit the Minnesota river valleys, I find it difficult to get the correct settings to get maximum heat regardless of energy use. This could be a fatal flaw considering how cold my wife gets. I have read the complete climate control section of the manual and tried different settings - the temperature still seems lacking. Advice anyone?