She has plenty of chew toys available to her. She is spoiled with attention (she is in our living room where where homeschool) and she gets her food at predictable times each day.
The cage chewing seems to be prompted by excitement/impatience over food and begging for food (particularly if you sit in one chair near their cage). She also will chews at the divider between her and her cage mate (we have been unsuccessful in introducing the two since adopting in March).
My husband suggested using a spritz of water (like you do when cats jump on counters) but I am not sure if that is the way to go with guinea pigs. Any successful training tips? Or do we need to invest in some plexiglass panels?