Your lower vent tent flaps look closed. If so, leave them open. Those tents are well sealed. Your plants generate humidity. Your plants need fresh air as much as anything else. Is that the only fan up top? I'd put a small one on the floor as well. Looking at your pics I don't see an extractor either. Do you have one? If not, you need one. I would keep the side flap partially open and all of your hoods open until you get one.