The walk-in is the coolest spot (obviously) but not necessarily the least humid. Isomalt is pretty sturdy but not indestructable. It loses shape like a tuile in slight humidity. In part that is how refrigerators work, by removing moisture from the environment. Hence the drip pans on the bottom of home units and a hose leading to a drain on commercial units. This is why some produce wilts if not stored in an airtight package. As to the condensation issue I don’t think it would have been a factor since he would not have been in there long enough for the cold to be a factor. I agree that both sides had some issues like Marcel not inventorying his Mes before they left or ideally the night prep was finished. I am glad Marcel lost I just think his arrogance got in the way. The whole Master Cook bit was just too stupid for words. It is not enough to copy someone else’s technique; you also should understand how it works. Like in one of the earlier episodes where he waxes poetic about needing a temperature controlled bat, Chef C retorts that it is not needed to do Sous vide.