Paste a headline you are actually using. This tells you who it is calling, where it pushes, and rewrites it in your own words with the pressure taken out.
A headline does not convince anyone. It gets recognized by the person who was already looking, and ignored by everyone else. Both of those are the headline working.
If your headline needs a second line to make sense, the thinking underneath it is not finished yet. Go back to the premise, not the wording.
These are shapes, not fixes. Every one of them can be written honestly. That is the only test they had to pass.