Where on the windshield does the sun pass sticker go?

Next to rearview mirror

For me, the best position is at the top of the windshield, next to the rearview mirror, on the passenger side.

I put my mine,which can be taken on and off on the middle of my windshield. I dont leave mine on all the time because the hot sun.

I put mine in the top middle, just remember you cannot remove it or it will not work.