Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Where's the heat?

When I received this straightener, I used it one day and it worked great. By the second and third time, it wasn't as hot, even though the setting is at high. It heats up quite a bit significantly less than it did at first.Now I have to send it back.... and do I want to go to all this trouble again with this same product? No, I'll go back to the cheaper straightener that I bought at Target.