Baits are an effective way to get rid of any cockroaches that may be in your apartment.
Pesticide dust is a very effective way of getting rid of cockroaches in your apartment.
Sticky traps are very good at catching roaches in your apartment.
Cockroaches thrive everywhere. Not just in obviously dirty places. Clean your apartment.
A cockroach is capable of traveling in and out of cracks as small as 1/5 inch.