To edit or delete a Reviewer's score, navigate to the Reviewers Scores section and expand it and select the reviewer. In the example below we have Corry's scores in context.
Click on the criteria you want to edit or delete the score for. With the criteria open, click the Cancel button (see below):
Hover your mouse pointer over the row of the criteria and you'll see both an EDIT button and a trashcan/delete icon .
Related terms: evaluator, can't delete, unable to remove, cancel score, remove, purge, edit score, modify, change score