Frozen disks in 42

Hello everyone, how do you deal with the foggy windows in the smart? Mine stood now 3 weeks, today, rain weather, just over 0 degrees, the visual impairment by the foggy windows was immense. Despite full throttle ventilation the windows did not become free. If it is a little warmer, I can handle the problem with the air conditioning, but now…? I really want to drive the smart right now, when the weather is scolding, but no snow, ice is lying. Any Idea?