What is gorilla glass?
I recall when EFBs were introduced the company newsletter reported one being broken by a pilot poking the touchscreen so hard with a pen that it pierced/cracked/holed the screen. But I reckon that was on purpose.
I’ve seen ink, grease, food, yoghurt etc on the screens.
Would temperatures be an issue? Would the glass get hotter with an insulating layer of thin plastic on it?