poop always on egg

[ufgrad98]

Hi. I have a hen that always lays eggs covered in poop. I know that it is normal to have some poop on eggs, but this hen always has lots of clumpy poop stuck to her egg. The nest box is clean and the other eggs that I am collecting aren't covered like this one. Is there something wrong with her or is there something I can do to fix the situation?? She had a prolapsed vent about 1 1/2 months ago and I was able to fix it but since then her eggs are always covered with poop. Please help!!
Thanks!

 

[ChickenCanoe]

Could be related to the prolapse. Have you had a fecal sample done to test for worms? That would be my next move.