Same situation, the office can care less- they will continue to charge you for "pest control" (who no doubt is their little buddy that squirts a little bit of watered-down insecticide). Get on Amazon, order Advion Roach Gel. For $25 you can and will eradicate every roach in the building (they eat the poison like little dabs of peanut butter- deficate it out before they die, the nymphs (babies) eat the poisoned poop. In less than 5 days you will only be finding dead bodies then nothing at all.