Deja....check out the last page of my C crowd thread.....link in my sig......what X-Crispi says about root suffocation.

I'd use something other than plastic to cover your dark spots.....even a towel or something would be better just because there is some air exchange with a towel or paper vs plastic.

I too have turned ghetto for the last few weeks of my grow. We seem to be battling the same issue.

I hope that works for you.....you deserve a good grow.