You took drastic measures for a drastic situation - I hope it all works.. I had problems like that in California when I lived there; every day - no matter what I did - never a scrap of food anywhere for them to feast on - took garbage out daily - still had problems and one day GONE - like they'd never been there; I used panel magic on my walls, chlorox on my floors and cupboards, appliances, and never left a dish around - no snacks did I have during this time - and it seemed so all for naught - so I hope it worked for you!