Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Doesn't work for me

I have been using derma blend since 2003. I bought the setting powder but it never works. When I apply my concealer, I dab on a generous amount of setting powder and leave it on for 5-10 minutes before I dust it off but the concelaer still remains moist/wet and rubs off if I touch it or brush up against clothing etc. Perhaps I got a bad batch but it makes absolutely no difference to me.