I wouldn't bother taking them apart, it's way too much time consuming, i would rather do it this way:
Use some kind of cleaner in spray, for instance brake cleaner that will get rid of the old mix greas-with dust, some break cleaners might get into reaction with rubber so read on the label. clean it off with rag wait a moment till it evaporates in hidden corners where you can't use rag.
Apply lithium grease in spray, move the that part a couple of times to make sure the grease will cover it around and that's it.
Remmember that you should do it more often then just once a year as the lube/grease will get washoud out eventually after 5-th,10-th or 15-th ride in the rain when it's outside with all that water pouring on it, you just have to check if they need lubing unless your kickstand is giving tou that aweful sound just begging for lube.