How do I delete a saved phrase/ sentence / message?

You can delete or clear a stored message (saved through Save button) in the keyboard. 

1. Clear the contents of the sentence box by double tapping the delete key to clear. 
2. Now tap the Save button. 
3. Next tap the button that you want to clear. This saves the cleared message into the key that you want erased, In effect, this deletes the stored message.