OK, here is a strange one. My wife claims there is a faint wisp of something that looks like steam coming from the vent once in a while. Anyone have any ideas?

 

A little more info please.

In the heat of the day?

Only in the morning?

When it rains?

When she turns the temp to warm?

 

It seems to be when the engine is at temperature. She also said she thinks it was on recirculate when it happened. Every time it happens it is during the day as she rarely ventures out before noon. It rained last night, but there was no rain the other times. I hope that helps, thanks.