Roots on my Phalaenopsis violacea

[penfold2]

I've had this orchid for about 4 months now. The leaves look healthy to me, but the roots do not. They look wrinkled, as if they're not getting enough water. But I water it several times per day in a greenhouse that runs at 70-80% humidity. The roots also have a few dark spots, but I'm not sure if they are new, or left over from the old potting mix it came in.

So is it getting too little water? Too much? Something else?