In the Volkswagen Jetta VI, the device is not the same, but the device repulsating it. The push button is protected by a rubber duster, but after the car wash there is a water that freets at low ambient temperature.
To avoid this problem, you can drain the mechanism after the warm air or remove the moisture from the cleaning napkin immediately.
It is not difficult to open a luchet with a frozen mechanism. A credit card, screwdriver, or other suitable instrument needs to be attached to the cover on the side where it is opened. The button needs to be pressed, designed, and it's better to warm it up. You can process a problem with silicone grease or WD-40.