Okay. I don't know how many people follow this thread, seeing that no body is interacting

but I'm gonna go ahead and just write as if it's my personal diary.
I have come to the conclusion that the black spots I have seen on the leaves of all plants are in fact bug poop or something alike. That was no mildew. On the other hand, the big unknown plant (which I have harvested) had also mildew. Pretty expected when you consider I live in a place with 80% humidity at times.
Since the harvest, I have hung it to dry in a shed with open door and open window. 2 days ago I brought it inside and installed a very small fan blowing in the room, not directly onto the harvest.
I have made a power source on the outside of my house, next to the greenhouse, and have proceeded to install a fan blowing hard wind on the rest of the 3 plants (the Jack Herer sisters). That should and seem to have taken care of the humidity problem (I have no hygrometer, but it's on its way).
I still see the bug poop from time to time, but I simply wipe it off.
Meanwhile there's another addition to the family, cheese auto from freeseedsonline.com (I am not aware of the merit of their genetics. I chose to order from there because it's really cheap compared to the rest). I am going with a scrog experiment.
These are the 3 jack sisters. I've decided I won't keep more 3 than 3 plants at a time from now on, in order to give them more space from another. Also, because the fan's current location (infront of the front), the greenhouse is always open, so I guess its effect is largely gone.
They seem to be doing well!