Make sure that the inside of the glass is clean. Any dust or other schmutz
on the glass gives moisture a better place to condense and create fogging.
Use a good glass cleaner and a squeegee.

On my '01 lw300 at least, the defogger position will automatically turn on
the A/C (regardless of the setting of the a/c button). Problem is at low
temperatures, the a/c will not dehumidify. So, in very humid weather near
freezing, the only recourse is to leave the window open a crack and crank
the heat in defrost mode.

Make sure that the recirculate control is off. It may be more energy
efficient to recirculate the air but if the a/c can't dehumidify it, the
problem only gets worse.

Oppie

_________________
"holley10" > wrote in message
...
| I have a 94 saturn and when its cold out side or raining all the windows
| gets so foggy inside I have to roll the windows down or be constantly
| wiping all the windows and the defroster works only on the windshield
| rear glass has a defroster install in the glass it's ok I just found
| the n/g and dont know if the problem has been posted before
thanks