How do you fix the bath in virtual villagers?

You have to have puzzle three solved .And level two Restoration . Then take one of you master builders to the Alchemy lab and on top of the board you should read something like drawing plans . After that is finished you can take your villagers and put them on the bath and they should read fixing bath and then they should just finish it after a while if you would like it to go faster .Go to options and change to fast also theres a potion .I dont know it right off the bat but you can google virtual villagers3 potions and there should be the answer!!!!