How often do you wash your makeup brushes?

I wash mine 2 to 3 times a week. The thing is... I only have a few make up brushes and I'm waiting for the 16 pc. brush set I ordered from an online store to arrive by Monday. If they work well, I guess I'll order another set or something and use set #2 when I'm washing and waiting for set #1 to dry.

I clean my make up brushes every week. I wash them with a little Johnsons Camomile Baby Shampoo and warm water and then I leave them to naturally dry. I never used to wash my brushes when I was younger and then I realised how much dirt, oil and bacteria builds up on them and now I make sure I wash them on a regular basis.