With problems up top, look down below. Pop your 'chid out of his pot and soak the roots in tepid water for about 10 minutes. Roots that plump up and turn green are good, live roots. Roots that stay shriveled, or are squishy, are goners. Trim the dead, rotted roots from the plant, give the remaining roots a soak in hydrogen peroxide ad re-pot the orchid. If you had a lot of dead roots to remove, you may want to put it into a smaller pot.