according to a previous detail, ana said her blog was haunted, and we have the incident that killed people in an explosion.. here's some thoughts:
maybe put ghosts at the end of the link
or put demon at the end, considering explosions are basically giant fireballs, demons are associated with fire
both ghosts and demons haunt stuff, i think
maybe try ouija too
as for the -+-+, what uses that? maybe something with gas or a zoom feature?
edit: maybe we need to subtract, add, subtract, add some numbers we've gotten so far; considering that there seems to be a pattern of small numbers being used (small being under 500 at least), maybe we'll get a small number- alternatively, add, subtract, add, and subtract again since it's also a pattern for things to be backwards here, then put the sum to use somewhere
what would be associated with the sum we get (assuming we have a set of 4 numbers, anyways) or where could it be used?
im not a technical guy so all i can really try to provide is thoughts