Filtered Against Baddies, Jerry, and Warren even the filter doesn't work on him
Get headphones for computer: Check. Stock up on rock salt: Check. Get an iron fire poker: Check. Get snacks that you don't need to leave a salt circle to prepare: Check. Download movies for computer so that you can stay within the circle and drown out EVIL ghosts: In progress.
This is my gameplan until I can figure something else out.