Just two nights ago I went out to the garage with the intent of opening the case and spraying it down with WD-40 just to loosen up the sticky switch a bit.
I'm glad I couldn't help myself and ended up completely overhauling the switch... and by "completely overhauling" I mean removing the ONE screw that holds it all together and giving all the pieces a good cleaning.
Ahh, it feels so brand new I even signaled my lane changes on the ride to work

Lesson? Don't half-ass it.. you'll be happy in the end.