cooling Case for iPhone SE

I am looking for a case for my iPhone SE that will not cause over heating and may even cool the iPhone.

I bought a used iPhone SE. I got an otter box soft + hard case Otterbox Symmetry. With the case on, I noticed that tapping certain areas of the screen were problematic. I do not know how long the iPhone was on. I tend to leave the iPhone plugged into it's charger. The problem occurred in three different solitaire games. Also, had some difficulty scrolling. Taking the case off the iPhone made these problems go away.

Robert