About these roach stations:
Roaches are not intended to die in these stations. The stations
contain an agent which when ingested by the roaches, will kill it
when it crawls away, and remains "contagious" to surrounding
roaches that crawls across the dead roach or feeds on the dead
roach.
If your car suffers a serious roach infestation, these stations may
not be sufficient. You will need to fumigate your car first, then
place WipeOut stations in your car.
By the way, how old is your car, and what do you use your car for?
How come so many roaches??