I was having a hard time finding a brush cleaner that was gentle on my brushes, but effective. As all of us know makeup brushes can be very expensive! This product worked really well. It did not damage my brushes. It was tough but gentle! It didn't leave any makeup behind. It was hard to believe, especially for my foundation brushes! I love Clinique products, and this one was not a disappointment. It also leaves my brushes smelling amazing! This is a really great brush cleanser!!