I actually have a coincidentally relative story.
My male BP who is roughly 3 years old went off food in early January. I offered roughly every two weeks 3 times. At that point, I knew he was on a food strike, so didn't offer again....
Until last night...
I noticed Saturday night that he was poking his head out of his hide, so thought maybe he's getting hungry. Sunday night, head out again. Now I knew he was hungry.
So last night I offered for the first time since March 9. Sure enough, he took it almost immediately.
My point is, nothing to worry about. Offer no more than every two weeks. If a few consecutive refusals take place you've likely got a snake on food strike.
Just keep your eyes open for her head poking out of her hide at night. Once you see that behavior on a few consecutive nights, go ahead and offer. I bet she'll eat then.