Come tai tais, share your bad experiences you had on products
you are unhappy with, be it shampoo, cosmetics, etc.
Warn others about it! 
My list:
1) Prescriptive Blusher
It doesn't stay. Plus, the powder is hard to pick up.
2) ALL Clinique products
I think it's good if you have oily skin type. Not for me
though.
Extremely dry.
