Dove orchid leaves with brown spots

[mkampf]

I am fairly new to orchids but was lucky enough to obtain this Dove orchid. I don't want to let it down. I feed it weekly and water it every 4 days. I leave in east facing window most of the day. I obtained it and it was very healthy and now it looks like one leaf is getting weak and wilted and several others leaves have brown streaks. The one bulb looks slightly shriveled so I mist it with water. Am I over watering or under watering? What should I do?

[King_of_orchid_growing:)]

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