i think it's the glasses that are giving you the problems Dawn, and you're gonna have trouble keeping them from fogging with the temp where it is. also, the bandana is not helping. i would go with a tinted shield, or at least a tinted strip at the top of a clear shield. then, leaving it cracked open like Spok mentioned will actually help you. a lot of clear shields are fog free, but i have yet to see a tinted one that is. if you stick with a clear shield and just add the tint stripe at the top, you might not have any issues.
Deron, we miss you buddy