I do not use the product in the attic and on the entrance to the garden (along the front wall, below a wooden structure - weather-restricted area). The mice take the bait immediately. Due to the lack of designed bait I can see that this is like and quickly adopted by the mice. Therefore acts perfectly with me. I have additionally designed another bait of "Bayer". Whether the bait acts in non-weather-protected areas, I can not say. The mice are gone at least for me.