I don’t know about you, but when I have a nasty case of the hot phone, I have to get rid of that heat this instant. Just kidding, I usually just put it down for a while or restart it when it’s being especially stubborn. But there are companies out there marketing a different solution: little stick-on phone-cooling fans that purport to draw all that heat away. And their product images are a little, uh, excessively icy.

How did it come to this? What kicked off this arms race of increasingly…