All I can do is commiserate with you. My broody is on day 23 today also ... however, she's only sitting on five eggs and one of them hatched yesterday!
I am going to continue to let mine sit until day 25 and then figure no others will hatch. We went out almost every half hour every day and when she was off the nest we would pull any extra eggs that the other hens had laid in her nest. I marked the original five so we would know which ones to leave with her.
You can't make a broody go back to being a 'normal' hen. I've heard that she will continue to be broody until she hatches a chick or has sat for well over a month. I don't have experience with this though so someone else will have to jump in to give advice.