Freezing windshield wiper XC60

Hello municipality, in general I am very happy with the moose (especially now also with the AWD). BUT: Yesterday it was minus 10 degrees and it snowed. Now the following happens: The snow, which is pushed from the wiper direction A-pillar, is there more and more, because it can not get away and freezes, because there is no disc heating (as with the SEAT Altea e.g.). If the wiper moves down, it takes again snow and pushes it down completely, where to the disk auc h no warm air comes, it freezes again. So the wiper blade takes some snow with each wipe, freezes and you don’t see anything anymore. Do you have a solution for the problem? Grease wiper blades with lätta or something? Before questions come up: The air vents below the bonnet were free, but I guess that at -10 degrees the exhaust heat of the diesel engine is not enough to thaw the wiper. LG vom erzbmw