When I ran into the same problem I disassembled and then reassembled with very light oil as I was sure that in very short order anything that was in the line of grease or lube would all too soon clog up again.  I have had no problems with the throttle since cleaning and "oiling".  I actually used gun oil as it is made to operate in cold temperatures as well as hold to the surface.  Just my .02.

Cowboy