 around the dryer vent it will kill them as they crawl through it's great for wasps and hornets it's good for box elder bugs spiders ants earwigs but the seismic is is wonderful for that really slow release control that you'll get for for insects the bug blaster from high yield is wonderful also doesn't last quite as long as the seismic but it gives you a really quick knock down and that's also great for grasshoppers as well too so the bug blaster would be excellent