Instruct: Classify the given Amazon review as either positive or negative.
Query: good product turned bad

We used to use this product every winter since we have 2 wood burning stoves. But about 2008 they must have changed the ingredients and now they are very hard to light, don't stay lit easily, are very hard to break apart, and to separate, and compared to how they used to work, they are now a useless product. I wrote to Jarden Home Brands to tell them the product is now inferior but they did not respond, apparently not caring about customer satisfaction. Don't waste your money. This is a formerly great, user-friendly product that the manufacturer has ruined by making it with cheap ingredients. I'm looking for a better product elsewhere.