When I first got my wkg, it took some time to start seeing some growth (about 1-2 weeks). Not theyre are out of control! (can't keep up with it sometimes!). It now is super carbonated and has that slightly alcoholic taste to it (a good sign).
Originally I started with raw honey, then black molasses but noticed a moldy film on top of the solution (not sure if its good or not), but since I switched to raw turbinado sugar, I had none of that.
I also add a dry fig and half a lemon juice - I think its critical to have the lemon juice as it adjusts the pH for the good bacteria and prevents some of the baddies growth. Are you adding the lemon?
Let me know how it goes
Mike