Place the ice cubes on top of the soil near the edge of the pot. Use one ice cube for pots that are 4 inches wide or smaller. Use two ice cubes for pots that are more than 4 inches wide. As the ice melts it will water the orchid.
Check soil moisture approximately eight hours later by pushing a finger into the soil up to the first knuckle. If your finger touches moist soil, the soil has enough water.
Repeat every one to two weeks or as needed.