Just don't stop.

Seriously though, the advantage of safety glasses is that they are wide-open with extensive ventilation as you ride, but with a wide windscreen for protection. Besides an antifogging agent, the other main strategy to prevent fogging is sealed goggles, usually with double panes, to prevent moist exhaled air from fogging. I have used such goggles, but found that if I breathe hard enough, for example going up hills, exhaled air does get into the goggles and fogs, particularly my eyeglasses, but then it's hard to get the moist air out.

I think that since these goggles are designed for (downhill) skiing, they are not sealed tightly enough for the increased exhalation due to this more strenuous activity of cycling. Since most of the time on the bike is riding rather than stopping, the safety glasses are more effective for me. Also, the safety glasses are more comfortable when wearing my prescription eyeglasses, and the rigid earpieces support my Take-a-Look mirrors (right and left).

When encountering a stop, I will slow down enough to keep moving and minimize the stopping time. I'm also one of those cyclists who will run a red light when traffic is clear. If a stop needs to be prolonged, I’ll lower my face mask and try to exhale downward. Finally I try to anticipate the road conditions immediately before me, and as I start riding, if the fogging is light, it usually clears within about 20 to 30 feet even with the slow start-up speed. I don't bother wiping it out.

The important thing in particularly cold weather is that the fog not be allowed to ice up.