sunmask foggy glasses

I kayak fish in fla and usually wear a full (head,face and neck covered) sunmask.

I find that my glasses fog up frequently.

Any ideas on how to prevent the fogging ?

I've tried every brand of sunmask there is, and the only ones that 1) fit my huge melon comfortably and 2) minimizes/eliminates fogging if worn correctly were the Simms Sungaiter and Sunhood.

The breathing holes do wear thin after a couple of seasons, but I bought a few and rotate.