I just found it ironic that you were quoting him in regards to humidity level, yet you weren't completely following what he recommends. He also recommends 30 days of treatment, not 14 as you advised. But he frowns upon having Baytril as the default go to treatment protocol and not testing first to decide the best course of treatment.
I suspect that he also probably frowns upon people without a veterinary degree prescribing a treatment on an online forum too.
No argument from me that he's the best there is, in the US, if not the world.