So I decided to build a green house in this space inside my basement that wasn't being used. It's a great area for the greenhouse and I tried my best to seal of the room. I coved all the walls in cardboard then wrapped the entire thing in thin plastic to try and keep the heat in. Just after my first time with the heater on, the ceiling is covered in condensation on and on the plastic. The ceiling is metal and I know that's why but I just have no idea on how to fix this. It's a real problem because it's weighing down my ceiling plastic and dripping all over.. Someone please help, I'm all ears to any ideas