Since The Fly Inn traps use the simple technique of trapping insects on their sticky glue, they are good as long as they're still sticky. Once they're full (we leave that to your discretion), the sticky insert can be replaced. The advantage to this is that there are no chemical odors being introduced into your home. No pesticides. No insecticides. No smells. No toxins. You can sit back and enjoy peace of mind as your traps do all the catching for you, looking stylish to boot.