Right now you're expecting some kind of magical solution and those just don't exist.

So take the door off the closet. Store the door under your bed.

OK - Now you've got the opposite problem from what you had before - except now you have all the room in the world to run any kind of vent sytem you want. Then you can cover what's left with black plastic.

Also - flat white paint is almost as reflective as mylar, but walls absorb heat whereas the mylar just reflects it back into your closet. You might want to get rid of the mylar and just go with flat white walls.

JMO

PC :thumbsup: