Rebecca takes on Emma in a battle to decide who rides The Human Carwash. Who will get an ultra mucky sliming and who will be the one laughing. But, it's not all as straightforward. The winner will have to take a seat in the gunge tank and watch on in fear as at the end of the mucky ride, the gunged contestant will get to pull 1 of 2 ropes. One of which is connected to the gunge tank, the other is connected to the finale gunge in the carwash. All to play for right until the very end..