Another thing he and his traffic calleagues have noted with driver use of car heating and demisting systems is that lots of drivers also leave their cars heating system in the recirculating mode and that doesn't help clear the windows when the same air is being pumped around the car.
yes it does,if you have aircon and a demist setting. the aircon dries the air in your car, thats why you can get a sore throat if you leave it on tool long.
It certainly worked that way Thursday and Friday,. Thursday was spent driving around Grimsby, Scunthorpe , M180,M18 AND M1 with the recirc on, and Friday i was in York all day,,, with the recirc on.