That's tough bro that's going to be hard to deal with that damn mildew and you got that enclosed like that.. even though you got it open on the ends you might have to open up those sides. at the very least probably have to open up the top anyways. but you have to open up something more to get that air moving or you'll be treating for the powdery mildew... I'm here to tell you. I've been there done that got the t-shirt and burned itI’ve got a fan blowing on the lady who is flowering in there, I’ll install another as time goes on. The front and back are open to allow airflow, hoping not to end up crawling with mold. The rh outside is 99% too, humidity here is always a problem. The girl flowering now is my tester, keeping that fan on her day and night.
make sure you have the green cure... have it on hand anyways and hydrogen peroxide wash as I was helping you out earlier.
P. M. is Relentless it doesn't take much so you got to be on it all the time God I hate that shit