you can always spray a bitter spray on everything. Have a friend who used it when her brothers dog was visiting. That stuff would keep everything from chewing on it. I'll ask her what the stuff is. Its NOT the bitter apple. her brothers dog loves that stuff but even her dog who doesnt chew anything thats not hers (ha yeah right her dog is a PITA with a capital P) but my point is this stuff works. Problem is, if YOU touch it and then forget and touch a glass or your mouth YOU taste it too. Its very effective.