I can't believe there are still exterminators that are spraying for roaches. Get with your apartment manager, ask him the name of the exterminator, call them up and ask them what they use for exterminating roaches. If they are not using baits, they are behind the times and need to use baits for roaches. Insist on baiting. It is VERY successful and can end your roach problem without the spraying and bombing.
Baits take about two weeks to take effect, but after that it's like a miracle - they all die.
Let me know how you make out. Well, first of all, your exterminator should NOT be spraying or bombing for roaches. And it doesn't matter whether you're in a high-rise in NYC or a two unit apartment building in Kansas City. Nowadays, you BAIT for roaches. And baiting for roaches is much less invasive and much more successful than spraying.