Cockroaches prefer dark, warm places. Check all areas in your kitchen. Make a general cleaning, wipe the floors and countertops on the kitchen, do not forget about all the cracks and corners, which could get pieces of food in them.
Then use borax or boric acid. Borax is the salt of boric acid, and these products works in the same way. Put it on the corners and where cockroaches probably live. It is toxic to cockroaches and kills them on contact, but it is safe for humans, so we wish you good luck in this fight against roaches! Find more helpful info about borax using in our article How to get rid of cockroaches.
Want to know about other effective cockroaches control products? Read our review of the 12 best roach killers.