Want Heater Hoter

[Brice Warnick]

Cold weather in Michigan puts my cold weather in Kansas to shame.
My coolant temp guage only goes to the thick line on the left of the
center line. It used to go farther right  between these 2 lines. Where
is yours sitting?
Do you ever remember your car blowing warmer than it does now? Mine
seemed warmer in years past. 
Please explain the piece of cardboard. Would you put it in back or in
front of the radiator?