For real, though,

I have cleaned and cleansed every surface in this apartment, I have thrown away every scrap of garbage, and I have scooped the cat box. I have coated the entire apartment in a thin layer of boric acid, and covered that thin layer of boric acid in another, thinner layer of deadly poison. And it does nothing. Nothiiiiiiiiiing.

I know what I must do now.

I have to burn the building down.