You need to gently remove the orchid from the pot to check the roots. You may have some root rot issues from watering before the CENTER of the bark (under the roots) has dried. So gently remove it from the pot, soak the roots in tepid water for 10 or 15 minutes. The roots that plump up and become firm are live roots. Any that stay limp and are squishy feeling are rotting and need to be removed.