@Shannon818 I'd probably mention what they are in your guest manual. if they have a little light on them they could be annoying in bedrooms, (we don't buy any that light up, well not after the first time, haha). I know what you are describing, we also use them in summer in my residential home in the subtropics (midgies can get through screens) and my hubby swears they work. He would very much appreciate seeing them! But then again, people who are from the tropics are not as likely to complain about bugs in the first place......