In any home pest control regimen, we cannot stress enough utilizing various methods of pest control. Not only do certain pests develop a resistance to some pest control chemicals, but they can also develop an aversion to certain baiting formulas, as well.
Use sprays that have different chemical compounds. You can also buy insect spray from https://chemron.com.au/product-category/pest-control/. If your cockroaches are pyrethroid-resistant, using an insecticide that contains pyrethroid will not do you any good. When making an initial purchase of insecticide, just bite the bullet and buy at two and make sure they use different chemicals for control.
Then, alternate usage at the same time that you alternate your bait. To be effective at long-term control, it is best to make certain that you are using your control methods correctly.
Do you know all of the available methods of control? Do a little research and make sure you have all the knowledge necessary to enact a well-rounded integrated pest control plan for your home.
A pest control supplier will have time-tested knowledge and information that can be useful to you. Let your ego take a break and ask a professional to share some of their how-tos with you. You'll save yourself time and money by clarifying anything you don't feel sure about.