Wiping water nozzles

Moin. Now the winter has started with me and as it is, the windshield smears a bit stronger in the weather. Now I have the problem since the temperature drop, that no wiping water comes out of the nozzles. Of course I have antifreeze in the wiping water container, so it is not frozen. I had also made the nozzles extra free. Does anyone have any idea what this might be about?