Yes, good advice from Ursula there, but NOTE! she says "cut the dry flower stalk". So you should wait until the stalk is brown before you cut it off. Sometimes the stalks stay green, they branch and put out new flowers, or maybe even a new baby plant (called a keiki).
Also watering when needed means you should test the medium with your finger, and water when it feels dry-ish. Where you are, the air is dry, and your house will be warmer, plus the light coming in the windows is brighter in summer as well. You probably need to water more often than you were through the winter. If you run a/c the humidity in the house is also reduced by that. But if you use a swamp cooler (I'm from Utah where we use those) it will actually humidify the air a bit - a good thing for orchids.
My Phals usually only bloom in the spring for a couple of months, then grow through the summer and start spikes again in winter for the next spring's blooms. They're very slow growing so be patient with them.
