Originally Posted by Someoldguy
For what it's worth, I've always had a rough time with goggles fogging
I'm guessing you are somehow bundled up to the point where you are breathing with your nose and mouth almost directly into the goggles. The proper variables in place and you even have all your body heat venting into them. This is your problem. Avoiding this on cold days requires a little attentiveness or adjustment of your shit.
Also do not wipe the inside of your goggles EVER it has anti fog shit on them that you probably already wiped off
FWIW the Smith turbofan is a nice feature I wish others would copy but I'm an Electric guy.