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These cold mornings present a problem with my eye glasses and face shield fogging up to the point I can't see.
I tried fogtech DX Instant Anti-Fog wipes with great success.
I found them at the local mountaineering store. They work well for skiers, too.
I strongly recommend them.
(I don't work for them or related in any way other than being a satisfied customer sharing a great experience with fellow riders)