How to spit in the black pool

I've had difficulty triggering these quests sometimes as well - the trick seems to be clicking directly on the NPC in question - not their conversation bubble.

There is a location a lot closer where you can find the slow and dry moving zombies. And that is if you go from Norma's house, to the street and turn right following the street till you reach a fence. Reaching the beach and close to pyramid point. Past the fence are cultists, and walking around in that area are called (reawakened, or something else will check later on) warrior. Also there are Slow and Dry zombies at the Graveyard, behind the church (Dearly Departed.) These count as Dry and slow zombies.

In that location you can get both the cultists and slow and dry.

I'll post a screenshot later on.