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Nozzles should pop up every 5th windscreen wash. I might be wrong but something like that. That's the case in VW, Mercs pop up every 10th. Nozzles don't have an electric mechanism, they pop up with the help of high pressure water and a strong spring forces them to go back to its original position. Maybe the springs malfunctioned because of the cold weather or they froze because of the water.
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