Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work as expected

Shipping was fast, unfortunately the trap did not work as expected. I purchased based on reviews on Amazon. I did not have the trap 'covered in fleas' as several reviewers had stated. I know there were fleas on the dogs and even though I used it according to directions, it took almost a week of constant use to get 20 fleas. Works great on dust bunnies