Spider not eating

[Goblin_King]

So my jumper (Phidippus johnsoni) won't eat. She's had a good appetite for months, but now when I give her food, she attacks and kills, but doesn't eat. She's gotten really skinny and I'm worrying a bit about her. I've tried different kinds of prey, with the theory that she couldn't sink her teeth into a cricket (even though she never had a problem before), but she reacts the same way to everything I give her. I suppose she could have a molt coming up, but it's been a couple weeks since she's eaten anything and her abdomen is shriveling up into nothing.

Any ideas or advice would be greatly appreciated.