Uh, it takes less time to take apart the CV assembly then mess with that cone. It is not complicated, you are just talking about a few parts:
1) "C" clip
2) ball bearings
3) Outer Cage (has tapered head that needs to go in thick head towards engine, narrow end toward middle of CV shaft)
4) Inner Cage (has receased lip and will only go on one way flush)

Super easy, just slowly disassemble, clean, and reassemble. It is so simple and easy once you have done it a few times, I would never think about the cone thing. Just disassemble and reassemble. The grease that comes with the Dormans is great, but I always like to repack the inner even when I am not replacing the CV boot.