Makeup brushes and tools are the key to perfect, flawless makeup. If they are dirty, well who knows what grime and yucky stuff you are applying to your face. Also, you dip you brushes into your eyeshadow for example... Your just spreading the germs around. It's not good.
I have found that once I started to take care of my brushes, my brushes then took care of me by not making me break out with blemishes. So my advice is clean clean clean!
I like to clean my brushes at least once a week using Johnson's Baby Shampoo. Obviously this is super gentle for washing baby hair, so this is perfect for taking good care of your tools.
I have made a little video of how I like to clean mine, pretty simple all you need is a dirty brush, water and Johnson's. Once you start cleaning you won't stop!
How do you clean yours?