Does anyone know of an anti-fog cloth or treatment for sunglasses?  Back in the 70's when I worked in a ski shop we sold a product for this, but with mixed results.  Anything like that available today?  Right now, every time it's hot or I get sweaty, my lenses start to fog up...

I've used This stuff called Cat Crap. It works decent at first but after 6-7 applications it keeps them fairly clear except up at the top by my nose. 

Check with an optometrist for their input and recommendation.

I had a jar of green stuff that worked pretty good . It was a long time ago . There was a man at one of the stores demonstrating it , snake oil salesman . It was in paste form.

CLARITY DEFOG IT:

Formulated to prevent fog on the toughest lenses, such as glare-free lenses, CLARITY DEFOG IT™ earns the highest ratings with athletes, military personnel, safety professionals, and, quite simply, the everyday consumer.

 

http://www.nanofilmusa.com/products/anti-fogs/defog-it/

 

Finally, An Anti-Fog that Works

http://safetycommunity.com/profiles/blogs/finally-an-antifog-that-works

Thank you!!