what if you make a snake trap, put a mouse and some mouse bedding in it and try and make it so she can get in but cant get out as easy. a large container with a card board flap or something so if she gets in she cant get out so easy. Not saying it would stop her but at least gives you a chance.
The bigger the mouse smell the more likely she will be back IMO.
If it smelt like chicken or chocolat i personnally would come back![]()