I think the spelling errors analogy is very apt and the same approach works for finding things that need CWs.
You're likely to employ an editor and a proofreader, both of whom will help you find things you don't see in your own work. They may be able to offer CW feedback, too, or you could employ a sensitivity reader.
Be as thorough as possible, but something will slip through (also like typos), so don't overthink it.