A word of advice

Say you happen to drive a Ford pickup with no air conditioning. And say you're driving to visit a friend on a 90+ degree day. If you happen to think to yourself, "Self, I have this ticket for a free car wash; now would be a good time to use it", you also ought to think to yourself, "But self, with no air conditioning, this truck cab would soon turn into my own little scorching Death Valley, but with 954% humidity."

This is all hypothetical of course.