Harris Bed Bug Traps use irresistible food lure to attract bed bugs. These traps should be used to detect bed bugs in your home or business and may be used on an ongoing basis in combination with other products. Additionally, if you have taken steps to eradicate bed bugs and would like to monitor their return and ensure that they are completely gone, the traps are a great, cost-effective option. Pesticide free, no chemicals used. Replace after 90 days.