Welcome to the forum!
I've had a couple pickky eaters in the past.
You could try removing her water bowl and balling up a bunch of news paper in her enclosure. Put about 3 live mice in with her. Check her out in about ten to 15 minutes. I put in a little rodent food for the mice. After about 20 minutes I take out uneaten mice and news paper and put the water bowl back in. Unless the snake is in the process of eating, in this case I give a little more time.

Good luck!