hello it's Hans here my country is very cold at winter and my car doors have frozen shut I'm going to give you some advice on how to open frozen car doors first I'm going to tell you how to prevent your car doors from freezing in the first place and then I'll tell you how to open an already frozen door preventing the doors from freezing is quite easy try to get as little moisture in your car as possible connect the snow and water off your shoes when you get in your car use a car interior pre heater it will dry some of the moisture and melt some of the ice when the locks while it's on I have connected the pre heater to a block near the passenger seat I keep the heater on full power now when I use the block heater the interior heater starts as well by the way you should always use block heater when it's cold mine works with a power cord but there are also ones that run on the car's gasoline I keep my block heaters power cord in my house not in my car this way I can get the heaters running even if the car doors are frozen shut you should use the icer solution regularly on your car's locks in the winter time squit the solution into the locks like this I usually add more once a month the solution prevents the eyes from gathering in your lock and it also melts the existing eyes you can buy the icer from any auto parts store