I use a bottle of water wetter too and it helps. Use of ac keeps everything around 184. No use of ac and it goes to like 195 or so.
I set ac for recycle, lo temp setting and lowest blower speed. I vary blower speed for more or less cooling. I also close the passenger side vents when its me and just use the drivers ones.
I had a slidable block I zipped to the grill. I close it in the morning, then open it for the afternoon drive.