Instruct: Classify Amazon reviews into positive or negative sentiment
Query: NOT NONSTICK!!!

These cookie sheets look great, until you use them. They are not non-stick unless you grease them GENEROUSLY. Then the grease bakes on and you cannot get it off. This happened after only using a few times and washing them immediately after use. They are also hard to clean because they are too big to immerse in a kitchen sink and not recommended for the dishwasher (they wouldn't fit in one anyway!). I agree that it is hard to make a good cookie with these. The bottoms are always over done. And it is hard to get the cookies off the sheet without damaging them.