You know when everything is quiet something has to be wrong.
Every time Lexie is quiet for 4 or 5 minutes I know she's chewing on A. one of her shirts B. her collar that we no longer use or C. any kind of cap to anything. she finds them from spray bottles, pop bottles, anything. We are always really careful not to leave them around but she finds them anyway. I'd say the bitter spray would be the best option for the cord problem. Lexie had a problem with chewing up carpet and getting to the insulation underneath. We are renting the upstairs of an old house so it's in a mild state of disrepair and one day she got out 1'x 1' section of insulation and was happily chewing on it, I nearly had a heart attack! The bitter spray stopped that problem really quick so I hope it can help with you too!