Stops,
~ Try this:
take a warm damp clean rag, with a small pale of warm clean water, a little soap wouldn't hurt either, clean the
inside of the door jams, if you look closely there will be a dirt build up where the rubber door seal closes on.
I suggest cleaning the entire door jams, both sills and rubber weather stripping. Dry wipe each door, then
afterwards, use the new WD-40 white lithium grease spray on all the door sills and rubber weather stripping.
Rub it in and polish it around with another clean rag, repeat the following week.
For the door locks, internally spray the cylinder door mechanism with WD40 regular penetrating
fluid and work the key inside the lock back and forth a dozen times.
Then follow each key hole with the white grease, do the door lock mechanism itself as well,
activate the door lock dozen times to get it to work in, repeat a week later to ensure it got a good coating.
Don't forget the trunk as well, same procedure, rubber seals and metal where it closes on,
trunk lock and locking mechanism.
all just needs the dirt cleaned out of the tracks and re-lubricated.
also, carefully run a beat of spray around the window track but I'd use WD-40 clear water resistant
silicone spray on those as to not make a sticky mess with the glass.
When the windows are frozen due to freezing rain do not force the windows down,
it will eventually break the plastic clips inside the window actuators.
Last resort: have a long extension cord ready in the garage with a hair dryer,
work the lock with a bit of high heat and your in.