And the best antibiotic for this (broken egg) is Baytril:
Baytril 10% - All Bird Products
The dose I use is 0.07 ml per pound of body weight twice a day orally.
You're asking lots of questions that can't really be answered without us seeing pictures of the problem.
Unless you've seen yolk dripping from the vent, the clear stuff is unlikely to be egg white, cause where there is egg white, there is yolk.
Have you or your mother stuck a finger in her...