I didn't even try to use them. If you read the warnings on the back of the package, it's pretty scary. The warnings say not to breath, or touch the octenol at all and to seek medical attention if you do. When the package arrived from UPS it stunk! Sitting on my couch I opened the package(cardboard amazon box, not the octenol package or lures themselves) and got a headache within a couple of minutes from the smell. There is no way I could live with that smell every time I went into my backyard. The Flowtron 80D does a good job without them. I threw the octenol lures away the same day they arrived.