In some picking Hyundai ix35, the wipers only operate automatically, including from the rain sensor, that is, when there is precipitation on the glass. However, it is possible that the glass is already heavy in the rain before the sensors actuate. The same problems are observed in snowy weather.
It is recommended in winter not to freeze snow in the place of the sensor by directing the air to the glass. In the rain, the wipers can be manually activated by pressing the handle down or adjusting the rain sensor's response with a special wheel.