Just a thought, did you rinse out the hides reaaallly well after cleaning them? It could be possible that some left over soap (bleach/vinegar/whatever you use to clean with) dried to the hides and doesn't smell very nice to her

Sometimes after I move things around my vives the snakes check everything out for awhile, and don't settle in one hide. Even Beau, my ball python was just sitting out on a log earlier today after I took him out and added in a large water bowl and moved some hides on him - at like 2 pm, even with the bright light coming into the room he's in. He finally chose a hide after a couple of hours.

I wouldn't worry though if everything else is the same as it's always been. It could be that she has gotten too large for the hides and just now decided she didn't like them... you never know! Even if she can fit, she may not want to. Try adding a bit of a larger one (even like a cardboard box temporarily) just to see if she goes in it.