Liquify.
https://max.mailbigfile.com/98fdf9a9a60b2686ba7e34f922bae4c5/listFiles.php
The trouble is, it's difficult to know when to stop. It's hard to know when it's perfect, you know?
Make sure you convert the layer to a smart object before liquifying (which I didn't do) so that you can come back and tweak it as often as you wish.