Here ya go, Fellers; another practical and low-cost piece of advise from your friend Mike Stone:

Forgit 'bout spittin' on yer lens. That's jest fer scuba divin'.

Seriously, though, one of the very best and safest fog proof materials around is bar soap found right in your bathroom. Wet the soap and apply a thin film to your lens. Let it dry throroughly. Then, polish it off with a soft, dry cotton towel.

Your lens will be sparkle clean and will not fog.

Spend the money you save on your next cup of coffee and toast to the guy that gave you the good advise.

Mike