I got my first set of decent brushes not long ago and want to be sure I'm taking good care of them. I'm reading differing opinions online. Everything from once a week to once every other month.
With the exception of my foundation brush which gets washed daily, I try to shampoo mine (I use baby shampoo at the moment) once a week. I'll also sometimes use Sephora's antibacterial spray in between washings if a brush needs to be cleaned.