Dithane m-45 how to use

[Zoren]

I have never had a problem with fungus, until (only at the suggestion of RF Orchids) when I purchased 2 Species Phalaenopsis: A Bellina in double spike with a bud (no fungus) and a Cornu cevi with 6 spikes with one bud (water spot fungus) that's what he said the small black spots were. I think that they sell you the fungicide as a protection because they grow all there orchids in an open air greenhouse and the leaves get wet. I grow my orchids in an almost completely dry sun room environment (I do mist the orchids at times). I keep the room at about 86 F during the day (most of the time the AC is off during the day and at 11 pm I turn the AC temperature down to 75 F at night (for a 10 degree difference) until 7 am the next day, back to 86 F.. Thank you for your input...Zoren...