YellowS2000:
From a neighbor in some even more chilly domains I recommend you try using a silicone door stick. It stops the doors from freezing stuck...
Heres one from the swedish low cost store Jula, but there should be more out there:
https://www.jula.se/catalog/bil-och-garage/biltillbehor/vintertillbehor/lasoljor/silikon-listfix-629084/