Stop breathing so hard in your car!
I rarely run the a/c in the winter or defrost. I keep the inside of my windows free of haze by wiping them once a month with Invisible Glass cleaner. I've driven loaners cars that has the fogging problem but mostly it was due to light haze already existing on the window.
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'10 Mercedes C63 AMG
'09 E90 335i Fully Loaded-Sold
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