Head down to Wally World and buy a bottle of "Rain X" Anti-Fog. It works!

 

Yep, it works! Have used it on goggles in all temps, no fogging.

 

The safety rep where I work has anti-fog cloths from the supplier of disposable safety glasses, these are like the small wipes at restaurants in tear open packs, work great, last long time!!

 

Just go into the kitchen sink area and put a little dish washiing detergent on your finger. You will only need a little. Smear it around on the inside of the shield till it is gone then wipe up residue with a clean cloth. That will get the streaks out of it. It works fine. I ride down ito the teens and twenty all winter. works good and its almost free...........