Phoebe, who's terrified of plastic bags moving, has been sneaking into the study and bathroom (low trash cans) and chewing on the plastic bags! We've tried yelling NO everytime we see her doing it (she'll stop, run away, and hide for awhile) but she keeps doing it. We switched to citrus scented trash bags thinking that would keep her away but it didn't work, so then we tried spraying various things on the bags, perfume, air freshener, vinegar, but no matter what, she chews on the bags and we're worried she's going to swallow some. How do I get her to stop?