Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not buy this product

I bought Bissell spotbot after reading many reviews. I used it on my very expensive platinum grey carpet. It leaves a large (the size of the mouth of spotbot)wet spot which doesnot go away even if the carpet is dry. I got professional carpet cleaners to help me get rid of the spot which did not help. I called Bissell and they would not stand behind their product. It is a no no.