Draggable Droppable Reset

Hi, is there a way I can reset the ui once the draggable object has been dropped onto the droppable object?

I have a draggable object (which has 'revert' to original position set) and a droppable object, Once I drag and drop the object onto the droppale area I can not reproduce the same effect when i drop the same object again. Im not sure if its the 'draggable' or 'droppable' object thats needs resetting? or if its the full ui?

Hope ive explained correctly.