Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Useless.. just a BAD product!

I've been using it for months, my scalp is getting worse and worse. It's even dryer and it seems to be some sort of rash. I hate it! btw, i haven't found a good product from Neutrogena, i've tried their face wash, sun block.. always bad experience. wonder why it's still a popular brand in US.