Trapping principle: 1.Cockroaches from four door enter into the trap. 2.Super thin aluminum can make various cockroaches into freedom. 3.Cockroaches along the bottom of the aluminum into the second nest,double guarantee let it nowhere to go. 4.Cockroaches were lured into the cockroach trap by sweet foods,goalkeeper will automatically shut down when roaches into the organs. How to use? 1.Put a piece of sweet flavor of cookies or other cockroaches favorite food in order to lure cockroaches in the base. 2.Cockroaches will smell the fragrance into the cockroach trap,trapped within the upper groove. 3.Then the cockroach trap immersed into the water about 20 minutes,the cockroach drowned. Guarantee: And if you are not happy with our cockroach trap for any reason, yes any reason at all,we will provide you with your choice of a replacement or a full refund. While many companies will ask you to pay hidden fees or make you fill out tedious return forms,our NO QUESTIONS ASKED GUARANTEE POLICY is also a no hassle guarantee policy.We always believe the CUSTOMER IS GOD!