Oh, they are new layers? Pullets?
Sometimes you may see a few glitches as they come into lay.
Hopefully the issue will resolve as they mature and become more confident in where to lay.
I'm sure you provide OS free choice, but if you can figure out which pullets are having the problem, then it...
What are you feeding?
Are all of them having troubles? How old are they?
Egg Drop Syndrome is not really that common in the U.S.
I would be looking at feed, check for parasites, etc.
Having a camera is a good idea, so you can know which hen(s) are laying soft shelled eggs - see if they are...
No, I have no idea.
I think you've been doing all you can for her. I know you've had many threads asking questions which is great, but often we do not have the answers you seek.