Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The 2x I've scorched the ends of my hair using this product

The 2x that my ends were really really badly scorched, and had to chop off at least 2.5 inches off my hair...was when I used this product on the regular. The first time, I thought maybe I just hot ironed too much...I quit using it. Started using Redken products instead until I ran out, a year later. I began went back to using this, and again my hair was badly burnt.