When one says "very hot" it means you can't touch it for more than a few seconds. It's alarmingly hot. (the back or front-facing part of the driver's binnacle). No glue can survive the surface-of-the-sun temperatures of the Lucid binnacle and windshield.
I tried putting my EZpass on the back of it and the glue melted (the glue that holds the Velcro tabs on). The transponder fell onto the top of the dash and traveled side to side on each turn.
I moved the EZpass to the windshield and it melted there too, and fell into the dark void of the foot-well.
Now I keep the EZpass transponder pinned to the windshield using the sun visor.
If only there was a clip that mechanically attaches the transponder to the visor, ala the old-style garage door opener.