We had hundreds of gnats in our kitchen. I put three strips in three places in the kitchen. I put one directly over the garbage disposal, another directly over the trash can, and another over a basket of fruit. I also put out a small bowl with apple cider vinegar with a few drops of dish soap near the disposal. Guess what? after three days, I did not catch a single gnat with the strips. I did however, catch and kill several dozen with the vinegar. Don't waste your money, they do not work. I gave this a one star because there is nothing lower.
When I received this, I hung it up by the window to catch flies. The flies did not even go near this strip. I have the Suterra Sticky Trap hanging by the window and not a one fly was enticed to check it out. Would not order this again. I am rating this item with no stars..but have to have one to close out the form.