What have you done since her last feed- how many times, how far apart, have you offered, in what conditions? What was your feeding routine before the refusals? She can go a while, so don't freak out, but it's time to try a few simple tricks to get her going.
Only offer food every 4-5 days, don't start offering every day.
Offer food in a feeding container, very small- think barely room enough to turn around. You don't want her to wander off and forget the food. A small paper bag with the top folded over, IN HER VIV, will also work. I would feed at dusk, or later, especially if your snake is out and active. I would cover the container, or use the bag. If the container, I wouldn't peek for at least an hour. If the mouse remains, then go several hours or overnight. I would heat the mouse to very hot, 102-104F, and cut several slits in its back. Some people have good luck with dunking (not cooking) the mouse in boiling water. If you use the paper bag, just put the mouse and snake and bag in the viv and check in the morning. I'd try two or three attempts like that before resorting to scenting methods, although one easy scenting method is washing the mouse in Ivory soap and rinsing well. Then there is chicken broth, tuna water, lizard scenting. Something people have had luck with is removing the water bowl for 24 hours and then offering a nice wet mouse. Then there's live- in my experience, I haven't had trouble getting a snake fed live back to FT.