Dryer softener sheets don’t work, rodents have been observed using them for nesting material.
The automotive OEM used to use mice and rats in controlled experiments to determine wiring insulation palatability. This is not a new issue, it goes back 70 years at least. Whatever they are using in the insulation is the problem, they should dust off the work that was done long ago.
Using soy or any food based material will not help anything. Some kind of bittering agent is probably needed. I’ll bet that’s what GM and Ford discovered too. It’s really sad to watch everyone make the same mistakes over and over.
The issue is the wire coatings. They outgas and when they get warm, they can smell sweet, like a tasty vine or root. It does appear some vehicles are more susceptible to this than others (ie different sources for wiring).
Keep in mind that what's good for the economy is nothing to get sad about.
Every once in a while the economy tree has to be watered with your green.
Think not of what your economic manipulators do for you, think only of what you can do for your economic manipulators.