Yeah, I won't beat you up over that tin foil, but please remove it.
You can buy an emergency blanket (Mylar) for $3, or paint it white as many will tell you this is even better
Dr. Jekyll
Well those cute little PC fans will do the trick for the first day, after that your plants are hooped
You need to circulate the air in & out of your closet not just swirl the stale air
Build in/out vents and buy a decent fan that can move the air.
Mr. Hyde