In addition to the other wonderful advice you have I will add that if she's totally ignoring the egg after a day or so you can remove it. I had this happen with Rosey, my Bourke. She laid an egg but totally ignored it. I took it away and she laid 2 more and then it's never happened again. She ignored them all each time. I mean if they ignore them I guess it doesn't hurt either way but I just took them out when I saw she was totally ignoring it.
My vet said to do the same thing . If the hen does not sit on the egg and ignores it, take it out. He said it may or may not stop the cycle, and that the hen may need a shot or two to help stop raging hormones.
I guess it's hard to change nature.
Really? After one day, get rid of the egg? That's going to stop egg-laying? Good luck with that.
He said it may work or may not. I also read intensively on this matter for years because it comes up a lot in this forum. The sticky's you and Jackie did were great. But it all comes down to the individual bird and many reasons why that particular hen will or will not lay an egg. People would be wise to read the sticky's and try all kinds of things suggested to stop the bird from laying. It's all hoo'mans can do to try and change nature.
What Violet did worked for her and her bird. She removed the ignored egg and after 2 more were laid and removed, the bird did not lay another. She was lucky. It may not have worked. Really, she had good luck with that.