Has anyone noticed how the ambient humidity affects the amount of vapor produced? I have noticed that the amount of vapor varies a lot. I started noticing this while in the pickup. It seems like there is less vapor when the air conditioner or defroster are on. Both of these remove humidity in the pickup. I have rolled the window down to let in fresh air and the vapor increases. I have also noticed this when the weather is dry or late afternoon there is less vapor. When it rains or early in the morning when there is a lot of dew there is a lot more vapor. It makes sense, I was just wondering if anyone else noticed it.