Jared, it is a very nice looking Phal!
At the moment I would simply enjoy the blooms, not thinking at all about humidity and fertilizing.
I would every so often stick my finger into the medium, if it feels dry, take the plant to the sink and let room temperature water run down the medium. If you get water into the crown, just tissue it out gently. Let the pot drip off and place the plant back into its spot, keeping it out of the sun.
Down the road, perhaps in Spring/perhaps Summer the plant will start growing new leaves and then might benefit from some fertilizer.
Have fun!
