If you have roaches in your kitchen then you most likely will need an exterminator. It is important to empty all the cabinets so the technician has complete access. Put all cereals and grains in sealed containers.
The technician will then have access to provide crack and crevice, bait, and monitors to all the areas of infestation.
Expect to have a regular service for 3-5 months depending on the infestation before they are completly eradicated.