Instruct: Classify Amazon reviews into positive or negative sentiment
Query: didnt work for me...

i have course, thick, dark blonde hair which i do not color and only blow dry / flat iron 1-2 times per week. i followed the instructions, trudging thru 2 days of having a 'greasy' head. i even re-straightened both mornings w my 450' flat iron. after the 48 hrs, i washed and air-dryed my hair. i've also washed and blown it dry since then but there is NO difference at all to my hair other than it seems slightly frizzier. wish i knew if i did something wrong or just not a good product for my hair...