Instruct: Classify Amazon reviews into positive or negative sentiment
Query: waste of money

I received this product 2 weeks ago. I used it on the one cat who I have been finding fleas on. He is an indoor cat and I do not know how he got them. I started to notice them when I was combing him one day. I carefully chose the product to use and I chose this. Omg, I thought he developed more since I used it. I used it 3xs. unlike others, I hate the smell, and wish I could of used it outside. all the windows are closed, because it is winter. This did not kill a flea.. so disappointed..