I left the vents off for five hours and sulphor bombed... here I am almost three days later and I see a few leaves with mildew still on them. I am cautiously taking off the mildew, and caught it again today for the first time since the bomb... curious to see if it spreads at all. I don't get why I have mildew when my r\h is usually right around 45%... that is damn dry.