While I know you don’t want to hear it… I would just replace the full display assembly [product|IF334-001]
+
While I know you don’t want to hear it… I would just replace the full display assembly [product|IF334-001] or [https://www.ifixit.com/Store/Parts/Apple-Watch-42-mm-Series-2-Screen-and-Digitizer/IF334-000-1]