It seems that my EO, Penelope, has developed a faulty bypass valve since she came back into lay again: There's been

on her egg every single time she's laid an egg. I know it's her, because there is no

in the nest box, just on the egg. I'm guessing there's not much to be done to fix her, so my question is: is the egg still safe to eat? When I wipe and wash them off, there is always have a darkish stain left on the shell where the

used to be. This makes me nervous, so haven't eaten any of them, because I don't know how much bacteria would have penetrated the shell.
Any advice? Do I poach 'em or pitch 'em?
RIP Scooby, AKA Awesome Dog. Too well loved to ever be forgotten. "Sometime in June", 2005 - January 24, 2017.
"Until one has loved an animal, part of one's soul remains unawakened" - Anatole France