JW's are all backwards on "grace" thanks to the Watchtower training.
To a JW, "grace" is a worldly term that has to do with Christendom. They assume it heavily means something to do with "being saved."
The Watchtower equivalent to free blessings from God is "Jehovah's undeserved kindness." And that has been sullied in definition so much that JW's are pretty sure that they have to earn, therefore be "deserving" of "undeserved kindness." Yes, that makes no sense but that is what it is.