Do you wash it after every use?
If not how do you store it? i have the body shop one and it goes all stiff when i just put it in my makeup bag, can't remember if it came with a plastic sleeve but i don't have it now if it did.
And what do you use to wash it with? washing up liquid, handwash, shampoo just isn't removing the foundation, been using estee lauders double wear.
Perhaps i should be washing the brush after use and not letting it dry on.