I found the Niro Forum searching about my broken door handle. Apparently that is not an uncommon event. I have a 2018 EX with Tech package. Like it pretty well but disappointed in winter mileage. Will have to see if there are any suggestions to help it. (It's pretty cold in MN so I understand some of the drop).
Hopefully I will find some useful hints here. Already found out about the door handle, so it looks promising.
Best suggestion. Mittens and a hat along with your coat. Don't turn on the heater until the engine has warmed up. Other than that, there is little you can do except put up with it. Summer and warmer weather comes pretty soon.
2018 Niro EX - Ocean Blue
GTA - Canada.