Have you tried just swapping to thicker bags that grip the board better?

Wait, "flush with lighter fluid"? That's wild, the stuff is basically solvent, of course it's gonna carry the grease somewhere. Who reads that and thinks yeah, let me pour that inside my lens?

Bet you're wrong about her being smarter. You bought a goose for 8 bucks as a joke and then acted surprised when it acts like a goose. That bird isn't running some master plan, she's just grabbing shiny stuff because geese do that. You left a hot forge unattended and now you're blaming the livestock for walking into an open door. The real problem is you got 4 hooks and 2 punches sitting where a known thief can reach them, which is on you and not her. Lock your bench, close the shop, and stop giving a farm animal credit for outsmarting a grown man.