My RAV4 EV has developed bad fogged windows - I am very familiar with cold weather/frost buildup etc... from normal ICE driving (including anti-freeze from a bad heater core causing the rainbow effect etc...) - this is something else.
I have 2 ceramic heating elements and use an AC warmer before I start driving, so lots of heat. You can pour heat on the windows for hours, warm or cold weather - no difference.
I tried cleaning the windows with different types of window cleaners (including the good foam types) - stays clear for 1 or 2 days, then the fogging is back.
The most likely possibility:
- my ceramic heaters are imbedded in the old heater core, with a tremendous amount of high-temperature silicon - perhaps the heat has affected the silicon and is gassing?
The film seams oily like - consistent with silicon...
Another (very remote) possibility is that somehow my charger is releasing a gas of some sort - it is mounted on the inside of the car and has an exhaust fan.
Anyone else seen anything similar?
It's a real pain cleaning the windows every day...