I would leave it alone and add a little root hormone to your water when you water it. If you make those roots too wet, they will rot. ( I have had root rot experiences with sphag under my conditions)
Otherwise, stick to the scheduled watering and fertilizing. Next time when you go to repot any orchid and you find the roots sticking to the medium - let them soak in water and they will detach. If you force them, the velamen (white coating on the roots) will tear off.
Others comments are welcome!