How to stick a suction cup mount

This! ^^

 

Probably works well, but unfortunately I don't have a covered area. And in the summer here in Fla the sun is directly over head for hours, so no matter which direction I park the vehicle cooks. So far the grease so working well. No signs of letting go.

 

You don't need one. It's not the heat that affects the suction cup, it's the UV radiation, so as long as the windscreen is not facing the sun directly it should be ok. As a last resort you can always put one of those "metallic" sun visors (a big one) on the outside of the windscreen if you have no other option than to leave the car facing the sun. I would even suggest doing this always, whether the car is facing the sun or not.

 

Learn something new everyday, thanks!