99 Lumina Defrost Problem

[natedogg07062]

The other day I was driving and it started raining like crazy. Once the rain stopped my outside windshield started fogging up around the area of the wipers. I had to keep the wipers on to stop it from fogging up in that area even though it wasnt raining. Can someone tell me the cause of that?

[wirenut2560]

my 90 does the same thing when the a/c is on turn up the temp on the fancontrol