I took my germed seeds out of the dome once they all sprouted. You should let the surface of your RW plug get dry before you water again. Your roots need time so search for water. They can't do that if the cube is always moist. It's probably drooping because it's overwatered. Throw them under the 400, at least 3-4 feet away. I would ditch the heat pad too unless it's really cold in your grow space.