My damn doors are so hard to open. Feels almost as if they are locked- and I need to pull real hard on the handles to open them. People try to get in my 330ci 2002 and think my doors are locked still eventhough they are opened. My driver side started to get like this first, and I went and got it lubed up, but now both sides are doing it. Do I just keep getting them lubed or do I have a problem?