Anyone had trouble with their doorlocks not working well enough to pop the lock when they are cold? They won't even open by pulling on the lock thing.

 

Sounds like you might need to clean the old grease off and use some good low temp grease on all of the linkages and if you can the solenoid plunger.
Mine were all gummed up and would not work too good until I serviced both doors and also the window regulators while you are in there.
Also check all of the plastic retainer clips on the pull rods.
The winter’s here get into the lower 70’s*
Good luck. Jim