choke sticks when cold

[Rema1000]

My choke started sticking a bit about a year ago.  I've been lubing it with Lock-Ease (a spray like WD-40, but graphite based).  Now that it's cold out, I'm finding that the only way I can set the choke in the morning, is to push on the carburetor-mounted choke lever, while pushing on the handlebar-mounted choke lever.  What works best, is to set the choke when I park the bike, when the cable is warm.

Do I have some kind of goo in my choke cable?  Are there any good cable lubricants for winter use?

[Egaeus]

Have you tried real cable lubricant?  The kind with the dealy that you put on the end to force the lube into the cable? 

[scratch]

Is the lever, the metal slide or the cable sticking?  Or, is it just the plungers?