I have a 99 Honda Civic (EX) and I have a problem in snowy conditions:

I start the car and keep the heater turned on fully (pointing to front
and back window) while i clear the snow. Then when I start driving, I
have the heater turned on - still pointing to front and back window.
However the windows incl the side windows turn pretty foggy very
quickly. Once the windows become foggy, i find it extremely difficult
to drive. what should I be doing?

When it rains, I keep the ac on inside, so the windows dont fog and it
seems to help.

Thanks,
GPN