In the Renault Fluence, the windshield is not completely heated: the top of the glass is not warming up. If you look closely, you can see that the upper strips are not connected to the overall heating loop. It's not really heating, it's an antenna built into the glass. That is, in Fluence, two antennas: on the roof and on the rear window. To ensure that the top of the glass is not frozen during the winter period, you can use the fan (send it to a problem area) or buy "glassware" on the Velcro glass and attach it to the glass.