I haven't tried it in a Tesla - will try it the next time I'm in one. The key is to set the temperature to something much higher than the ambient. If you're al

I haven't tried it in a Tesla - will try it the next time I'm in one. The key is to set the temperature to something much higher than the ambient. If you're already in a warm place, the experiment won't work. I've had multiple EV owners claim as you, and then demoed it to them on a cold day.