Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Tersano lotus LBU100 Sanitizing System

I purchased this product based on the high recommendations made by a radio personality in our area. Conceptually the product made lot of sense. I was, however, very disappointed when I started using the product. I called the Customer Service number and they were not helpful at all.Here is the problem I have been encountering. I cannot get the system to clean anything 100%. I get "Code F1" after the display shows that it has cleaned 97%. The Customer Service rep told me to keep trying it 6 or 7 times. Well that takes lot of time and patience. I have tried to clean grapes 4 or 5 times and still got F1 code. Now I clean 2 times and hope that the fruits are "pretty clean".I am not sure if I have received a "bad product" or most of the users are encountering similar problems. In any case I am not as excited about using the product frequently. I think either the manufacturer should fix their product or be upfront and state clearly about the F1 issue.