If you wear make-up, you probably use make-up brushes (and if you don't, you should!). If you use make-up brushes, you should be cleaning them regularly, something we all too often forget to do.
Bare Escentuals is a company known for making cosmetics from pure, natural minerals; cosmetics that are so good for your skin that you can sleep in them, and they'll improve your skin as you sleep. But the company is aware that no matter how clean their make-up is, their brushes will get dirty, not just from contact with cosmetics, but from contact with our bacteria-covered skin. Brushes should be cleaned at least once a month; brushes used for eyeshadow or anything around the eye should be cleaned every two weeks, for your own safety. I've had an anti-biotic-resistant staph infection on my face; it's no laughing matter. I'm much better about cleaning my brushes these days!
The Well-Cared For Brush "Conditioning Shampoo" is made with all the quality that you expect if you've used any Bare Escentuals products. It comes in a 4 ounce plastic bottle and is easy to use. Just moisten the bristles of a brush, apply a small amount (for example, a dime-sized blob for a large brush) at the base of the bristles, and work it through to the tip. Rub it under warm running water in your sink, and it will lather up nicely with a clean scent. Rinse until the product is gone, squeeze the excess water from your brush, and let it dry flat. You can also use a small amount in a cup of warm water, and soak your brushes in that. Again, rinse out the "shampoo" completely, squeeze out excess water, reshape the brush if necessary, then dry the brushes flat.
The bottle lasts a long time, and with regular use of this, or a similar cleaner, your brushes will last longer, and your face will thank you for it. I'm giving this a 4.5, because it does contain Sodium Laureth Sulfate, and it is possible to make your own brush cleaner for a lower cost. But Well-Cared For is a great product, and I'd recommend it to anyone looking for a brush cleaner.