In case anyone cares, I finally remembered to check if the UCO white candles melt in the sun in the car. As expected (since man. doesn't say they don't, and they would have...) they do melt, and become squishy and start to leave lots of residue. It only got up to 137F today on my dash (thermo right beside candle), I've seen it to 150F a couple weeks ago. Don't know the trunk temp. Will test the beeswax when I can find them.