It will take work to get rid of roaches and will be harder if you live in an attached building or apartment building. You will need to start by cleaning very well and eliminating all crumbs or traces of food and put all your food in sealed containers like cereal can go in a plastic cereal container. Then place sticky traps throughout the house and in your cabinets. It would be a good idea to have someone come in and spray or you can do it yourself but be sure to be very thorough. You will need to set a routine and do this every 30 days or so to kill any babies or roaches that have been in hiding.