Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beware, outer shell, may melt!!!!

I recently purchased this product. The first time I used it, I thought it worked great. I made a pot of chili and let it cook until we were ready to eat it that night. The second time I used it, things were not as good. The outer shell where the controls are were literally melting. I had programmed this to cook for 10 hours while I went to work. I came home that night and the hours had not changed. I realized I didn't click the on/off button to start heating the cooker. This may have saved a house fire. I went ahead and changed the time from 10 to 4 hours. This set the unit to high instead of the original low setting. Not 15 minutes after turning on, the outer covering was melting. I immediately shut it off. I see the 4 quart units were recalled back in 2004 for similar issues. Whatever their problem, it has not been fixed. Be aware of this serious problem when using your slow cooker. I am returning mine and will exchange for a different brand.