Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not a very good product

I wasn't impressed with these cleaning wipes. By the time you add postage, you'd do far better just using standard lens-cleaning wipes you can buy at any discount retailer. These don't even work that well; they tend to create streaks on the computer screen, and don't even do a great job cleaning dust or dirt specks. They're nothing special.