I had the version before and it was great for catching fruit flies. I decided to upgrade to the new one and pass the old one to my mom. I didn’t think it would catch house flies. I noticed a bunch in my house but never thought to check the trap. I’m so amazed and can’t believe there’s negative reviews because it’s so fool proof. I leave it on 24/7 and didn’t try the dawn soap mixture yet. This is all just from the blue glowing light attracting them. And I don’t even keep a dark kitchen- I always leave a LED strip light under the cabinets on