I'm 99.98% sure that Lil Fucker is dead. He ate a lot of the Decon and I haven't seen any evidence of him in the past few days.
However, this morning I saw new droppings, in new places. I do believe I have a new freeloader. I shall call this one Lil Bastard (yes, like the song).
Whereas Lil Fucker was more a couch and desktop kind of mouse, Lil Bastard really likes the bathroom and the area behind the trash can.