How do I keep the outside part of my vehicle windows from fogging up

Question

This happens a lot in the summer. The humidity outside is very high and when I run my a/c, at night and early in the morning, the outside part of the windows become foggy. Is there any treatment for this? I use rain x anti fog treatment and it works well on the inside, but I haven't tried it on the outside.

Answer 1

Rain X will work on the out side as well However, try cracking a window to equalize the temp before you park your car.

Terry G

Answer 2

try it on the outside