I bought a tube from the cockroach instructions:

If the cockroaches have been long, but not a lot of them: 1 package per room
If there are many cockroaches: 1 package per 5 square meters
If there are many cockroaches and there is a constant source of infection: 1 straw per 3 square meters

So I want to add if you wake up from the fact that the cockroaches take you out of the apartment run away from there at x%y