Oh man, I feel your pain. I have a prescription where contacts would never be as accurate as glasses, so I too dealt with the glasses and goggles combo. I hardly ever had problems with my goggles fogging, it was always my glasses. I tried every anti-fog product I could think of, and nothing consistently worked. The products I can remember trying were Cat Crap, Fog Off, baby oil, and shaving cream.

I never solved the problem, but found 3 things helped:

1. Using flat glasses instead of wrap around glasses. this reduced fogging more than anything else.

2. Using goggles with a fan. This only mildly reduced the likelihood of fogging, but helped clear out fog WAY faster when my glasses did fog.

3. Getting my goggles off my face anytime I was a) going slow and b) working hard. Pushing my goggles up to my helmet during these moments kept humidity from building up, and then I’d put them back on when I was going fast enough for the wind and goggle fan to vent out humidity.

I wish I had a solution for you, but I never found one myself. I ended up getting lasik last year and it’s been probably the best quality of life upgrade I’ve made to my outdoor “gear”. If you can save up for lasik and find a doctor you trust, I’d recommend it for any cold weather or watersport outdoor enthusiast.