I am smelling a re occurring odor through the ventilation system only on the accent of a hill on the highway. The dealership sprayed some antibacterial stuff through the vent. system but has not helped. They think there may be some stagnant water somewhere in the vent. system. The odor is nausiating. I drive 17 miles to work everyday, so I am breathing this stuff driving to/from work. I can then smell it when I am in the bathroom. I know it is not something that I have eaten