I see your notes now on cooling the cars interior down on hot days - do you have tints? Even super light ceramic tints will make an incredible difference. I've seen cars with tints so light I didn't believe they were tinted until the windows were lowered a bit and I could see for myself. Once you sit in the car after a bit in the sun its very clear though.
Between tints and one of those windshield sunshades, my car is almost never uncomfortably warm when I get in. The sun-visors on the windows are helpful so the sun doesn't snipe me in the eye and I can still crack the window on a sunny day.
Pic of what I am talking about for the windshield attached since I don't think many people have used them:
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After several years in Florida I learned to protect myself from hot shift knobs & dashboards.