Product review (4 stars): Run Unit Until Filter Dries !!!
Greetings...keeping the filter from molding is easy, if you remember a little about mold and its life cycle. Mold MUST have moisture to grow. Thus, what we do is place only enough water in the unit to last one night--I guess about two cups. I run it in the morning until it blows all the moisture out of itself, then I pop the cover off so it can get some sunlight--like vampires, mold HATES the sun! Anyway, our filters last the whole season--no problems. Cheers!