If your cat is actually eating the sponges this could cause an intestinal blockage so it’s pretty serious! If she has eaten one recently you should go consult a vet. If you mean she just chews on them, the situation could be less urgent but you should still stop her from having access to them. I don’t think you can train her to stay away from the sponges. If I were you, I would just put some sort of box over the sponges. Or maybe place the sponges in a cupboard instead of leaving them out in the open. Best wishes!
