I have done dozens of "Storms" without a problem. Then today, I failed twice on the "stinky potion". I follow the .eu guide and until now has been flawless. I used all the shovels first, then the poison, then used the "stinky potion" and it fails after I use just a few of the potions. I still use all the decomposers and there are no buildings left, just build spots, but quest fails just the same.
What am I doing wrong?