Delete your text of the draft, Click on "SAVE DRAFT," and the click on "DELETE DRAFT."
The "save draft" icon is the little floppy disc icon to the left of the gear all the way on the right, just above what you're typing.
Makes all kinds of sense to old fuds, doesn't it?
"The way," today is to poke, swipe or pinch and most "fixes" are designed to work within the first three attempts. No more thinking, folks. That's too old school.
OK, I made that part up, but it does seem true.