I play squash and sweat a lot. I wear protective goggles. The fogging is very inconvenient, and impairs significantly my vision by the 3rd game usually.
Is there any tip/recommendation to minimize fogging?
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I play in safety glasses without suffering unduly from fogging, although I often sweat heavily. If it occasionally happens, I clean them with a dry handkerchief. I think it's a feature of quality squash glasses that they are designed to allow air flow. Perhaps changing the model you use might help.
I also wear a "bandana" twisted up and tied around my forehead. This serves to prevent sweat from dripping onto the glasses during play. If you can successfully prevent this, fogging seems to be less of a problem.
Some seem to use their own saliva, baby shampoo, shaving cream, etc., but when I run a long distance, I always spray anti-fog agents. But how effective it would be will largely depend on how much you sweat and how you move.
I don't think it would be more effective when playing squash than running because you have to bend over more often to hit the ball dropping more sweat to your glasses.
Anyway, anti-fog agents work, but don't expect too much.