Can I save this t'ej???

[jshave1]

I've been making two gallons of t'ej in two seperate gallon glass jugs using balloons as airlocks. At the beginning, the initial batch bubbled nicely after about 4 or 5 days when left out to gather yeast and I figured they were ready for fermenting.

The first night, overnight, the balloons blew up nicely, so the next afternoon I gently and quickly let the air out. The next morning the balloons hadn't re-inflated at all and there appeared to be a green-ish scum on the top of each batch (mold?) and it had gotten quite cloudy. Another day went by, neither balloon inflated further. Did I somehow kill the yeast in these? From the little amount of air that got in through my venting the balloons? Was there another variable that could've done this? Can I revive the batches by skimming the green-ish stuff, adding mead yeast, and re-locking? Any help would be appreciated