k here is the solution and hopefully it works for you like it works for me now, i read the manual. this time of the yr is freaking cold so what u do is, set the temp to the max and the fan to whatever 1-2 i used, turn ur ac on and thats it, all u do now is adjust the temp how cold or hot u want it, it dont matter. ur fog problem gone. this is how i have mine setup. windshield and feet and the back. keeps me warm and no fog. this only works during the cold and especially when it rains. remember u will use gas while ac on.
in my case i turn the ac on when it rains or snow only, since thats only time my windows get foggy.